[Frontend] Dialog and overlay layout/positioning mods

open #159
open #170
Restructured overlay size and positioning approach
for better flexibility;
Getting new dialogs and the overlay to
play nicely in mobile context;

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

@@ -43,9 +43,9 @@
 	position: absolute;
 }
 
-.editor {
-	@include border-radius($basicCr * 1.5);
-}
+//.editor {
+//	@include border-radius($basicCr * 1.5);
+//}
 
 .contents {
     $myM: 0; //$interiorMargin;