WTD-839
Refactoring in advance of style mods to switcher when in frame;
Moved btn styles from _controls.scss to _buttons.scss;
Markup cleaned up with css classing simplified;
WTD-1163
WTD-1146
New CSS to hide non-functional elements, including browse.top-bar with search elements;
Adjusted spacing, mainly in .contents CSS class;
Add directive for exposing expressions which should be
evaluated for the browser's onbeforeunload event, to
prevent user-initiated navigation from causing a loss
of unsaved changes. WTD-1035.
Update the root object (used to populate the Library pane)
less often, to avoid recreating the whole tree and thereby
causing the tree to collapse. WTD-788.
Merge fixed position view work and general toolbar
work to begin adding toolbars for fixed position view,
WTD-879."
Conflicts:
platform/commonUI/edit/res/templates/edit-object.html
