Small improvements for when you want modals on modals

 - Fix backdrop removal bug when backdrop is off
 - Add keepOpen option to popup options
prevent click propagation from select component

Conflicts:
	dist/js/ember-widgets.js
	dist/js/ember-widgets.min.js
	src/select.coffee
prevent click propagation from select component
Fixes hide dropdown once and for all -- uses send instead of calling hideDropdown
selected color picker cell shows transparent indicator
Allow disabling select component
[color picker] handle rgb color
[color picker] bug fix
[color picker] tests
update color picker for rgba
update color picker for rgba and transparent
update
update again
update popover titles
update popover examples and spacing in popover titles
wip layout update for select dropdowns
remove log statements
remove debug console logs
fix typo
remove unnecessary styles