[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/tree.scss

@@ -30,5 +30,4 @@
 @import "mixins";
 @import "mobile/mixins";
 @import "tree/tree";
-@import "search/search";
 @import "mobile/tree";