open #95
IN-PROGRESS!;
Mostly buttons and menus classes (s-btn and s-menu);
Removed unused templates and .css files;
Normalized some button containers;
open #74
.section-header and form-row styles changed in forms/_elems.scss;
significant changes to overlay in mobile: full-screen, close button, more;
tree hover bg changed to use rgba(#fff, 0.1);
removed "Hide title by default" in core/bundle.json;
Refactor overlay templates to separate out the overlay
container from the inner dialog containing the form;
this permits the easy reuse of that overlay container
to supply a non-form-like About dialog, WTD-667.
