fix(breakout-rooms): enforce rooms order, minor fixes

[Antreesy]

☑️ Resolves

• Fix Breakout rooms mixed up in participants editor #11921
  • sort rooms in getter by id (order of creation, so 1 -> 2 -> 3) hard to reproduce
  • use server-provided room names where possible ParticipantsEditor
  • ease template in Vue SFC files
  • add some ?. conditions to avoid TypeErrors Vue devtools
  • fix styles to avoid double scrollbar in dialogs screenshot
  • don't mount NcDialog for deletion if not called explicitly console

TODO:

• find another way to restrict image sizes (now it affects user_status)

🖌️ UI Checklist

🖼️ Screenshots / Screencasts

🏚️ Before	🏡 After

🏁 Checklist

• 🌏 Tested with Chrome, Firefox and Safari or should not be risky to browser differences
• 🖥️ Tested with Desktop client or should not be risky for it
• ⛑️ Tests are included or not possible

[DorraJaouad]

For better format

.participants-editor__buttons {
	padding-top: 10px;

.breakout-rooms-actions__editor {
	padding: 20px 20px 5px;
}