Faster task switching

[freedom7341]

Program Manager's primary purpose is a program launcher. Due to its inception in the late 1980s and halted development in the early 1990s, not much progress was made in the realm of actually managing programs. Faster task switching would be a great feature for power users to increase their work flow. An early idea is to have program switching between the most recently used programs (based on z-order), similar to how a browser will switch between the first 9 tabs with ctrl and 1-9. Similar functionality may be present in Windows 7+, which is where shortcut keys and functionality may be inspired from.