Move Plasma icons to icon theme

Some icons had to be renamed to prevent conflicts:

old	new
zoom-fit-width	panel-fit-width
zoom-fit-height	panel-fit-height
kalarm	kalarm-symbolic
plasmavault	plasmavault-symbolic
applications-other	applications-all-symbolic
user-desktop	user-desktop-symbolic
preferences-desktop-display-randr	preferences-desktop-display-randr-symbolic
preferences-system-bluetooth	preferences-system-bluetooth-symbolic
preferences-system-bluetooth-activated	preferences-system-bluetooth-activated-symbolic
preferences-system-bluetooth-battery	preferences-system-bluetooth-battery-symbolic
preferences-system-bluetooth-inactive	preferences-system-bluetooth-inactive-symbolic
device-notifier	device-notifier-symbolic