This patch add the `threadRootEventID` as a parameter to media sending functions and forwards the timeline thread root between various application states to the place where its needed.
The 2 missing items are Locations and Polls which currently don't have any support on the Rust side for being sent within threads. That will come in a separate PR.
* Focus the media caption composer if a hardware keyboard is available
Not worrying about live connections, this screen is short lived.
* Fix a bug where you could hit the send button multiple times while waiting for the media to be converted.
* Begin processing media as soon as the media upload screen is shown.
* Add a composer to the MediaUploadPreviewScreen.
And send it's content to the media upload's caption.
* Use the new compound SendButton (updating relative padding in the toolbar).
* Update snapshots.
* Add unit tests for sending a caption.
* MediaUploadingPreprocessor - Prevent images without any GPS metadata from being changed
* Add support for sending images
* Add support for sending video, audio and file attachments
* Rename MediaPickerPreview to MediaUploadPreview
* Move media uploading to the MediaUploadPreviewScreen, add waiting indicators and error handling
* Add support for pasting and drag&dropping in media for upload
* Adopt new media picker source UI, remove developer flag
* Set minimum heights for timeline loadable images
* Fix invalid camera picker file names
* Fix flakey MediaUploadingPreprocessor image tests, improve gps metadata stripping
* UITests: Update existing screenshots and add new step for the room attachment picker
* Switch all github action runners to macos-13
* Cleanup enter key and paste message composer handlers
