This introduces a new base delegate that handles sizing the content of delegate in the timeline, i.e. it handles all the size helper stuff. This is then used for all the other main delegates:
- messages
- state
- read marker
This means they now all have identical base code to do the sizing (read marker still had legacy code).
Because the new base delegate is called `TimelineDelegate` both `TimelineContainer` and `MessageDelegate` have been renamed:
- MessageDelegate -> TextDelegate - this never made sense before images, videos, etc are all technically messages in Matrix parlance
- TimelineContainer -> MessageDelegate - this has always really been the base for messages
Note - this is mostly groundwork for dealing with the layout polish loop spam which will hopefully be fixed in part 2 with a bubble rework.
Rework the file menu so that it no longer relies on having a reference to the media delegate to manage a download for either opening externally or copying to clipboard. This allows the menus to be moved out of the delegates and maximize components and have them accessed through RoomManager. This reduces duplication and reduces the number of components in an already heavy delegate.
This is a very developer-oriented action, and other uses of this dialog
(such as interacting with room state events under a room debug page) is
also locked behind this option.
The dialog won't show again after being closed first time, so we need
to dynamically destroy it on both accept and reject. It helps clear out
any state on its way.
Change the `JoinRoomPage` so that it emits a `roomSelected` signal with the selected delegate's info instead of calling the functions to join or enter the room itself. This is so that the `JoinRoomPage` can be used for other purposes like selecting an existing child to add to a space.
Restore compact mode using the darker/lighter depending on color scheme background (i.e. the same as the bubble background) it broke somewhere in the refactor of roompage
Make sure that the console isn't spammed having `linkpreviewer` undefined in `LinkPreviewDelegate`, even though it shouldn't ever be and I couldn't find any case where it was but my console was still intermittently getting spammed.
ChatBar animated its implicit height, and there is no way for us to
force it animating on integer values only. It is contained in a Layout
type, and QtQuick.Layouts are known to round up size of their items and
position them on an integer scale. All in all, is caused bottom of chat
bar (action icons row and the whole bottom edge) to flicker during
height animation.
