Merge branch 'terencehill/weapon_panel_fix' into 'master'

Terencehill/weapon panel fix

Recent weapons panel changes weren't all good so I had to revert them: weapon icons currently are too wide when owning few weapons, onlyowned enabled and the panel shape is more squared.

Then I furtherly improved the previous code to achieve the same sev's goal, that is, more compact layout and better use of the available space.

See merge request !102