Cleanup remaining svg icons

[miguelsolorio]

Since we've adopted the workbench icons to use codicons, we should cleanup these remaining ones:

• src/vs/base/browser/ui/checkbox/checkbox.css
• src/vs/base/browser/ui/menu/menu.css
• src/vs/base/browser/ui/scrollbar/media/scrollbars.css
• src/vs/editor/browser/viewParts/lineNumbers/lineNumbers.css
• src/vs/editor/browser/widget/media/diffEditor.css
• src/vs/editor/browser/widget/media/diffReview.css
• src/vs/editor/contrib/parameterHints/parameterHints.css
• src/vs/editor/standalone/browser/quickOpen/quickOutline.css
• src/vs/workbench/browser/parts/quickopen/media/quickopen.css
• src/vs/workbench/contrib/callHierarchy/browser/media/callHierarchy.css
• src/vs/workbench/contrib/codeEditor/browser/find/simpleFindWidget.css
• src/vs/workbench/contrib/comments/browser/media/review.css
• src/vs/workbench/contrib/feedback/browser/media/feedback.css
• src/vs/workbench/contrib/terminal/browser/media/terminal.css

Not referencing Codicons

• src/vs/editor/standalone/browser/iPadShowKeyboard/iPadShowKeyboard.css
• src/vs/workbench/browser/parts/titlebar/media/titlebarpart.css
• src/vs/workbench/contrib/welcome/overlay/browser/welcomeOverlay.css
• src/vs/workbench/contrib/welcome/page/browser/welcomePage.css
• src/vs/workbench/contrib/welcome/walkThrough/browser/walkThroughPart.css

# Query: .svg
# Including: .css
# Excluding: extensions/*

src/vs/base/browser/ui/checkbox/checkbox.css:
  48: 	background: url('check-light.svg') center center no-repeat;
  52: 	background: url('check-dark.svg') center center no-repeat;

src/vs/base/browser/ui/menu/menu.css:
  54: 	mask: url('submenu.svg') no-repeat 90% 50%/13px 13px;
  55: 	-webkit-mask: url('submenu.svg') no-repeat 90% 50%/13px 13px;
  97: 	mask: url('check.svg') no-repeat 50% 56%/15px 15px;
  98: 	-webkit-mask: url('check.svg') no-repeat 50% 56%/15px 15px;
  210: 	mask: url('ellipsis.svg') no-repeat 50% 55%/14px 14px;
  211: 	-webkit-mask: url('ellipsis.svg') no-repeat 50% 55%/14px 14px;
  215: 	mask: url('menu.svg') no-repeat 50% 55%/16px 16px;
  216: 	-webkit-mask: url('menu.svg') no-repeat 50% 55%/16px 16px;

src/vs/base/browser/ui/scrollbar/media/scrollbars.css:
  8: 	background: url('arrow-up.svg');
  12: 	background: url('arrow-down.svg');
  16: 	background: url('arrow-left.svg');
  20: 	background: url('arrow-right.svg');
  26: 	background: url('arrow-up-dark.svg');
  30: 	background: url('arrow-down-dark.svg');
  34: 	background: url('arrow-left-dark.svg');
  38: 	background: url('arrow-right-dark.svg');

src/vs/editor/browser/viewParts/lineNumbers/lineNumbers.css:
  24: 		url('flipped-cursor.svg') 1x,
  25: 		url('flipped-cursor-2x.svg') 2x
  31: 		url('flipped-cursor-mac.svg') 1x,
  32: 		url('flipped-cursor-mac-2x.svg') 2x

src/vs/editor/browser/widget/media/diffEditor.css:
  54: 	background-image: url('addition-light.svg');
  58: 	background-image: url('deletion-light.svg');
  65: 	background-image: url('addition-dark.svg');
  71: 	background-image: url('deletion-dark.svg');
  98: 	background: url('lightbulb-light.svg') center center no-repeat;
  103: 	background: url('lightbulb-dark.svg') center center no-repeat;

src/vs/editor/browser/widget/media/diffReview.css:
  62: 	background: url('close-light.svg') center center no-repeat;
  66: 	background: url('close-dark.svg') center center no-repeat;

src/vs/editor/contrib/parameterHints/parameterHints.css:
  92: 	background-image: url('arrow-up.svg');
  96: 	background-image: url('arrow-down.svg');
  121: 	background-image: url('arrow-up-dark.svg');
  126: 	background-image: url('arrow-down-dark.svg');

src/vs/editor/standalone/browser/iPadShowKeyboard/iPadShowKeyboard.css:
  16: 	background: url('keyboard-light.svg') center center no-repeat;
  22: 	background: url('keyboard-dark.svg') center center no-repeat;

src/vs/editor/standalone/browser/quickOpen/quickOutline.css:
  12: 	background-image: url('symbol-sprite.svg');

src/vs/workbench/browser/parts/quickopen/media/quickopen.css:
  18: 	background-image: url('dirty-light.svg');
  23: 	background-image: url('dirty-dark.svg');

src/vs/workbench/browser/parts/titlebar/media/titlebarpart.css:
  88: 	background-image: url('code-icon.svg');

src/vs/workbench/contrib/callHierarchy/browser/media/callHierarchy.css:
  24: 	background-image: url(action-call-to.svg);
  31: 	background-image: url(action-call-to-dark.svg);
  35: 	background-image: url(action-call-from.svg);
  42: 	background-image: url(action-call-from-dark.svg);

src/vs/workbench/contrib/codeEditor/browser/find/simpleFindWidget.css:
  55: 	background-image: url('images/chevron-previous-light.svg');
  59: 	background-image: url('images/chevron-next-light.svg');
  63: 	background-image: url('images/close-light.svg');
  68: 	background-image: url('images/chevron-previous-dark.svg');
  73: 	background-image: url('images/chevron-next-dark.svg');
  78: 	background-image: url('images/close-dark.svg');

src/vs/workbench/contrib/comments/browser/media/review.css:
  150: 	background-image: url("./close-light.svg");
  155: 	background-image: url("./close-dark.svg");
  159: 	background-image: url("./close-hc.svg");
  164: 	background-image: url("./reaction-light.svg");
  180: 	background-image: url("./reaction-dark.svg");
  184: 	background-image: url("./reaction-hc.svg");
  197: 	background-image: url("./reaction-light.svg");
  206: 	background-image: url("./reaction-dark.svg");
  210: 	background-image: url("./reaction-hc.svg");
  415: 	background: url("./close.svg") center center no-repeat;

src/vs/workbench/contrib/feedback/browser/media/feedback.css:
  123: 	background: url('close.svg') center center no-repeat;
  141: 	background-image: url('twitter.svg');
  184: 	background: url('close-dark.svg') center center no-repeat;
  188: 	background-image: url('happy.svg');
  194: 	background-image: url('sad.svg');
  200: 	background-image: url('info.svg');
  245: 	content: url('info.svg');

src/vs/workbench/contrib/terminal/browser/media/terminal.css:
  160: 	background-image: url('configure-light.svg');
  164: 	background-image: url('configure-dark.svg');
  168: 	background-image: url('configure-hc.svg');

src/vs/workbench/contrib/welcome/overlay/browser/welcomeOverlay.css:
  152: 	background-image: url('media/commandpalette.svg');
  159: 	background-image: url('media/commandpalette-dark.svg');

src/vs/workbench/contrib/welcome/page/browser/welcomePage.css:
  223: 	background-image: url('../../code-icon.svg');

src/vs/workbench/contrib/welcome/walkThrough/browser/walkThroughPart.css:
  119: 	background-image: url('../../code-icon.svg');