Add support for popover without a target element
Kill janky get/set
Send cancel on click outside modal
Removes text editor, route, and links to it
Fix potential memory leaks

Arrays declared on a class are shared across instances and are globals (
availaible through the prototype ). A computed or observer that would
use it as a dependent key would prevent the object from being garbage
collected.
Do not add event handler if the view is destoyed.

As we add the event handler on the next run loop, it is possible for the
view to be destroyed before. This leads to memory leaks.
some small refactors
Makes structure of text editor and pills more intelligible
refactoring ember text editor
forgot to delete a file
adds contenteditable false to pills and removes useless keyDown/keyUp handlers
adds back ability to use custom key to bring up config menu on pill creation
tries to rerender all the pills
fix problem
WIP