[WIP][v1.4.5] General improvements and bug fixes

This is going to be a small release focused on some quality of life changes and general improvements. As such it's going to have a patch release version (v1.4.5).

Changes so far:

• Add cross-post option in post menu.
• Fixed a bug where changing the post sort type will not scroll you to the top.
• Changed what happens when a community is tapped. Communities will now open from where you are in the app instead of redirecting you to the home screen. This should make navigation less confusing.
• Fixed a bug where gesture action sizes will not apply until app restart.
• Fixed more crashes.