[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/_main.scss

@@ -61,6 +61,8 @@
 @import "forms/datetime";
 @import "forms/filter";
 @import "plots/plots-main";
+@import "search/search";
+@import "mobile/search/search";
 @import "overlay/overlay";
 @import "mobile/overlay/overlay";
 @import "user-environ/frame";