Make Window double-buffer the View buffer.

Add partially implemented ViewReady()
Accelerate presubmit check by running everything in parallel.

This made the checks go from ~3s to ~1s.
Improve buffer handling, still black screen
Start looking at docking management
Stop using tulib.KeyToString, I didn't like the format
Add small comment
Add enum String() method, implement resizeChildren() , fix Enter vs <enter>