Themes may change the app icon, which would also change the draft folder
icon in Geary. Import Adawaita's to match current use, install, use, and
update copyright.
When implementing bug 765359, it appears that Geary is doing too much
work to load icons. Simplify it a bit.
* src/client/components/icon-factory.vala (IconFactory): Don't bother
loading an application icon, it's easier and works better to just use
an icon name where needed. Don't bother adding all of the icons/*x*
directories to the icon theme search path, just make the icon's
directory hierarchy follow the XDG/hicolor spec and add the base
directory. Remove now-redundant code.
* src/client/application/geary-controller.vala: Set the default icon name
for all geary windows.
(GearyController:on_about()): Set the name for the icon in the About
dialog.
* src/client/components/main-window.vala (ApplicationWindow): Don't
bother loading icons for the window, just use the new default.
* src/client/notification/libnotify.vala: Don't bother passing the
application icon through for error notifications, an icon name has
already been set.
* icons/*x*/geary.png: Move to a new directory hierarchy that follows the
hicolor spec.
* icons/CMakeLists.txt: Updated to use new paths to the icons.
Better icon courtesy Daniel Fore. Also increased the size of the
toolbar and reduced the child spacing in the composer to better
utilize space. This might also handle #5054, but need to confirm
separately.
