**Steps to reproduce:**
- Go to Documents app in mobile
- Go to the kanban view
- Add some files and select one
- Click on `Info & Tags` button in the control panel
- Reload the page
- Chatter is not displayed but the button is still enabled
- Switching to the list view properly shows it

**Issue:**
Original fix (see [1]) was not enough for every case. Additional issues:
- Chatter hidden on init even when its panel has `visible = true`
- State desynchronized with the view when switching menu type (kanban/list) or by previewing a document and coming back
- When using the button with an open preview, chatter shows up in the background but is not accessible (and going back discards it)
- Removing selection with an open chatter disable the related action

**Fix:**
- Disable the chatter on mobile init by default to avoid having to manually move it back
- Reset chatter on selection removal to avoid getting stuck in the menu
- Reset chatter on view switch to avoid being in the wrong state afterwards
(and revert the previous css changes)

Not a great fix (quite mobile-specific) and there might still be some edge cases.

[1] original fix: https://github.com/odoo/enterprise/commit/cf3c2fce8a6b7b2d7547d44a0e4423f887986d52

opw-6061993

Forward-Port-Of: odoo/enterprise#121521