Multiple edits in one commit:
1) Cleaned up preferences dialog layout.
2) Option added to preferences dialog to use icons with view/apps panel buttons. Also implemented in extension code.
3) Panel buttons now use option entry textfield for label (no need to have checkbox to customize).
4) Frequent apps added as startup display option.
5) Frequent apps added to menu as category.
7) Renamed menu 'favorites' panel to 'shortcuts' panel.
8) Option added to preferences dialog to show 'favorites' or 'places' on shortcuts panel.
Removed 'Favorites' from startup-apps-display; Modified startup-apps-display default to 'Frequent'; Modified menu-layout default to 'Medium'.
Updated placeDisplay to use symbolic icons when 'places' shown on shortcuts panel.
Fixed issues related to showing 'places' on shortcuts bar and 'favorites' on button.
Fixed issue where hotspot not being positioned correctly after gnome shell refresh.
Removed code for Gnome 3.4 through 3.8.
Simplified placeDisplay code relate to using symbolic icons.
Updated default setting of panel buttons to use icons along with text label.
Fixed issue where volume identifier throwing error if not found.
Made hotspot positioning delay longer.
Removed Gnome 3.4 CSS files.
Reinstated GnoMenu panel button allocation to position hotspot.
Updated metadata to reflect release is only for Gnome 3.10.
Code cleanup: debug outputs renamed for consistency.
Destroy hotspot manually because it is no longer a child of GnoMenuButton actor. This fixes issue where hotspot still active with lock screen.
Renamed favorites panel to shortcuts panel; adjusted size of 'places' icons on shortcuts panel.
Changed default shortcuts panel icons to display 'places'.
Changing the menu default layout to 'medium' requires that the default icons sizes be adjusted in the schema.
Disabled epiphany web component temporarily to prevent loading issues in testing ppa's. Need to determine if the problem is permanent or just transitional.
Merge branch 'release-10' for Gnome 3.10