Separate menu entries for horizontal and vertical split views

The Views menu now has separate entries for horizontal and vertical split layouts.

Separate menu entries for horizontal and vertical split views

The single split-view menu item has been replaced with separate menu items for horizontal and vertical split layouts:

cm.application.menuStdViews

// Menu item keys
Old: views#twoViews
New: views#horizontalSplitViews
New: views#verticalSplitViews