preware: Implement UI Feedback

* Add Toast kind for pop-up messages
* Disable realtimeFit on panel to mitigate lag on old webkit
* Implement basic, action and progress toasts, control methods
* Implement onPackage signals for displaying basic/progress toasts
* Improve loading screen UI
* Use absolute positioning for package info scroller
* Separate current package updating & display refreshing into functions
* Fix minor spelling error
* Remove excess logging & unneeded comments
* Move can function from packagesModel-unconverted.js to typeConditions.js

Signed-off-by: Josh Palmer <jpalmerwatkins@me.com>