Reviewer: Josh

Changelog:
- Upgrade to using cascades R8
- updated the mkspecs in Makefile
- Removed DockLayoutProperties as the class no longer exists and it is ignored if the parent control doesn't have a DockLayout, which was the case in our code
- updated classes that have been renamed
- Removed warnings and fixed some member var names
- unset parent of controls after removing them, otherwise it now stays in the parent and could get deleted with the parent

Tests:
- Built the tibbtest to verify that everything builds and is functional
- install the mobile sdk in studio and built KS.  There is an issue with selecting list items, i will investigate and post the fix in a separate PR

Fixed issues related to KS operations

Changelog:
- Use triggered signal for listView selection
- Use default PaneProperties for NativeTabObject to fix back behaviour
- Removed unused vars
- Commented out using the cached result inside require implementation as it doesn't work as expected
- Renamed static private functions for naming scheme consistency

Tests:
- Ran tibbtest in the simulator using tibbtest and verified the list selection works normally and repeatedly
-- Verified that the back button works all the time (was working only once before)