relates to #1168

Requires MSC3266

Fixes #1129

fixes #1030

That way we can autohide the scollbar if needed, it should fix some
jumping issues, it makes it possible to flick on mobile, etc.

Some related bugs:

https://bugreports.qt.io/browse/QTBUG-75223
https://bugreports.qt.io/browse/QTBUG-44902

tastytea authored 3 years ago and Nicolas Werner committed 3 years ago

- Set TitleHint flag on dialog
- Store hidden events as QSet<QString> instead of std::vector<bool>
- Change wording in dialog (disable events instead of turning the hiding
  on)

tastytea authored 3 years ago and Nicolas Werner committed 3 years ago

This adds a dialog to the room settings in which the user can choose
which of these three event types they want to hide (additionally to the
default):

  - m.room.member
  - m.room.power_levels
  - m.sticker

The current state is read when room settings are opened and saved when
new settings are accepted.