[themes] Scroll bar handle can go MIA, add minimum width/height

Author: nirvn

resources/themes/Blend of Gray/palette.txt

@@ -1,5 +1,6 @@
 0:#0e0e0e
-2:#373737
+2:#727272
 5:#373737
 9:#727272
 10:#373737
+12:#c7c7c7

resources/themes/Blend of Gray/style.qss

@@ -304,6 +304,7 @@ QScrollBar:horizontal {
 QScrollBar::handle:horizontal {
     border: 1px solid @itemdarkbackground;
     background: @background;
+    min-width: 0.8em;
 }
 
 QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal,
@@ -321,6 +322,7 @@ QScrollBar:vertical {
 QScrollBar::handle:vertical {
     border: 1px solid @itemdarkbackground;
     background: @background;
+    min-height: 0.8em;
 }
 
 QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical,

resources/themes/Night Mapping/palette.txt

@@ -3,3 +3,4 @@
 5:#222222
 9:#535353
 10:#535353
+12:#d7801a

resources/themes/Night Mapping/style.qss

@@ -317,6 +317,7 @@ QScrollBar:horizontal {
 QScrollBar::handle:horizontal {
     border: 1px solid @itemdarkbackground;
     background: @background;
+    min-width: 0.8em;
 }
 
 QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal,
@@ -334,6 +335,7 @@ QScrollBar:vertical {
 QScrollBar::handle:vertical {
     border: 1px solid @itemdarkbackground;
     background: @background;
+    min-height: 0.8em;
 }
 
 QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical,