Dark Mode for common icons (#3386)

* Dark icons: small icons for common actions

* Added button_bar_spacer icon

* funnel & edit mode icons

* more 'native' look for the funnel & edit mode icons

Author: stychos

Resources/Images.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

Resources/Images.xcassets/button_action.imageset/Contents.json

@@ -0,0 +1,44 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "button_action.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "button_action_dark.png",
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "button_action@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "button_action_dark@2x.png",
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

Resources/Images/button_action.png …button_action.imageset/button_action.pngResources/Images/button_action.png renamed to Resources/Images.xcassets/button_action.imageset/button_action.png Resources/Images/button_action.png renamed to Resources/Images.xcassets/button_action.imageset/button_action.png

@@ -0,0 +1,44 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "button_add.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "button_add_dark.png",
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "button_add@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "button_add_dark@2x.png",
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}