Collect telemetry for #55

immediatly return focus to editor
show progress after 250ms
fix wording

Fix sensitivity not always being applied.

Fixes invisible cursor in long editor lines

Fixes mousewheel zoom in case of inline diff view

make menu item order explicit with 'order' property (default to 0)
make group order be the natural string order with exceptions for 'navigation' (always first) and falsy groups (always last)

Folding icon collides with git decorations: Create a div per linedecoration