So that dragging and then coming back to origin point does not
clear the selection.

Issue #3151

Clean up duplicated logic

Issue #3189

Closes #3188

Issue #3186

For example:

v1 = $v2
  |new line

body
  color $c
    |new line

Issue #3173

Closes #3179

Closes #3178

Closes #3177

... from an element focused by an event handler.

Fixes the dialog addon.

Closes #3169

Closes #3168

Closes #3170

So that the hidden textarea is actually near the cursor when it gets focused,
and doesn't cause weird scroll jumps.

Issue #3167

Issue #3164

Issue #3151

And do capture enter presses in this time to allow
quickfire completion.

Issue #3157

Backspace now brings back the completion widget.

Closes #3162

Closes #3154