v3.4.0-rc1 - First release candidate for v3.4.0

This is the very first release candidate for the v3.4.0 release. There are various improvements and changes throughout.
Please test and report any potential issues that may have appeared.

Flathub beta

This release candidate can be installed from Flathub beta using the following commands:

flatpak remote-add flathub-beta https://flathub.org/beta-repo/flathub-beta.flatpakrepo
flatpak install flathub-beta io.github.jacalz.rymdport

Rymdport can the be started from the terminal with the following command:

flatpak run --branch=beta io.github.jacalz.rymdport

Changelog

• QR codes can now be generated for easily sending items to supported apps (fixes #10).
• Rewrote a large part of the backend for displaying sends and receives.
• Progress bars no longer display the wrong percentage sometimes.
• Fixes a potential crash that could happen sometimes when sending.
• Added support for removing items that have completed the transfer (fixes #32).
• Added keyboard shortcuts for switching between tabs. See the Keyboard Shortcuts wiki for more information.
• Added an option to disable update checking on startup for release binaries (fixes #66).
• The receive page now shows which code a received item came from.
• Various improvements to performance and memory usage.