[Frontend] Sanding and polishing on common front-end elements

WTD-1048
Originally did a lot of this work in warp1048 by mistake
This commit pulls in all /platform-only changes from that branch
Mods are mostly related to WTD-1046 specifically, but also touch toolbar and buttons

platform/commonUI/general/res/sass/user-environ/_layout.scss

@@ -33,7 +33,7 @@
 		.tool-bar {
 			bottom: auto;
 			height: $tbH;
-			line-height: $tbH - 2;
+			line-height: $ueEditToolBarButtonH;
 		}
 		.work-area {
 			top: $tbH + $interiorMargin * 2;