Merge branch 'TextKeyBindings' into 'master'

TextKeyBindings

Updated Textbox.lua and DebugConsole.lua to handle ctrl-BACKSPACE (delete to beginning of line) and ctrl-DELETE (delete to end of line) keybindings.

Updated the RandomActor and RandomObject dialogs.

The RandomActor.lua:

autofocuses on the random actor placement button when opened.

Placed actors are full clones for the currently generated actor, with special handling for escorts.

See merge request !453