This PR fixes the column resize handle issues.
Fixes in https://github.com/twentyhq/core-team-issues/issues/1490 :
- We see the pointer blink when resizing => Already here before
refactor, this is because the mouse enter / leave events shouldn't be
triggered while resizing.
- Resizing handle sometimes cannot be clicked anymore / does not appear
anymore (see if another listener doesn't prevent this)
The code will need to be cleaned after all fixes have been done though
has it duplicates logic between the different header components.
