Portrait toolbar layout fixes
Active a tab next to the current tab when closing a using closeActiveTab

If possible tab that is after the current tab is activated, then falling back
to previous tabs, or finally none (if all tabs were closed).
Fade away active page when entering a new tab url

Loading starts when overlay animation reaches bottom. New tab
creation is cancelled either when the top area is clicked or
when the overlay is dragged down and released.
Remove old leftover code
Active a tab next to the current when current tab is removed
Open entering url view immediately before popping tab page
Fix screen capturing, context menu code path got broken previously
Add spacer to the secondary toolbar to fill middle part in landscape
Fix back / forward navigation state handling

New implementation is on par with master (update9)
Guard new tab cover action state
Improve landscape layouts of history list and favorite grid

Keyboard is hidden when grid or list is moved.
Improve landscape layout of tabs view