[Mobile] IN PROGRESS: Re-orgs after merge of Shivam's mobile branch

open #74
Re-applied changes to browse.html;
Added mobile/.../_search.scss;
Removed unused mobile/search/layout.scss;
Moved inclusion of search/_search.scss from tree.scss to main.scss;

platform/commonUI/general/res/sass/mobile/search/_search.scss

@@ -0,0 +1,13 @@
+@include phone {
+	.search {
+		.search-bar {
+			// Hide menu-icon and adjust spacing when in phone mode
+			.menu-icon {
+				display: none;
+			}
+			.clear-icon {
+				right: $interiorMargin;
+			}
+		}
+	}
+}