Merge pull request #47633 from Calinou/editor-theme-scrollbar-add-background

Add a subtle background to editor scrollbars

editor/icons/GuiScrollBg.svg

@@ -1 +1 @@
-<svg height="12" viewBox="0 0 12 11.999999" width="12" xmlns="http://www.w3.org/2000/svg"/>
+<svg height="12" viewBox="0 0 12 11.999999" width="12" xmlns="http://www.w3.org/2000/svg"><circle cx="6" cy="6" fill="#fff" fill-opacity=".082353" r="2"/></svg>

editor/icons/GuiScrollGrabber.svg

@@ -1 +1 @@
-<svg height="12" viewBox="0 0 12 11.999999" width="12" xmlns="http://www.w3.org/2000/svg"><circle cx="6" cy="6" fill="#fff" fill-opacity=".27451" r="2"/></svg>
+<svg height="12" viewBox="0 0 12 11.999999" width="12" xmlns="http://www.w3.org/2000/svg"><circle cx="6" cy="6" fill="#fff" fill-opacity=".294118" r="3"/></svg>