v5.3.1

🗒️ Notable Changes:

• Loading animations are now only shown if loading takes longer than 400ms. For quick connections, this makes flatnotes feel much snappier.
• Bumped all Python dependencies.

🪲 Bug Fixes:

• CMD-ENTER (on Macs) now works to save a note. Thanks @waschmittel.
• Prevent "This page is asking you to confirm that you want to leave..." warnings from being shown when they shouldn't. #261.