Log Message:
xournalpp: update to 1.2.3.

## 1.2.3

Bugfixes from various community contributors.

* Fixed spline live segment display (#5240, #5237)
* Allowed pulling spline tangents outside of page (#5298, #5277)
* Fixed redundant negative pressure values (#5241, #5238)
* Fixed asymmetrical fill of arrow shapes (#5258)
* Fixed zoom jumping and zoom steps (#5108, #4678)
* Fixed touchpad+trackpad combo (#5288, #5287)
* Fixed long text being truncated in LaTeX tool (#5264, #3293)
* Fixed background color in the LaTeX editor (#5307)
* Fixed window maximize state saving (#5302, #5245)
* Fixed project homepage url not being written into xopp-file (#5322)
* Improved backtrace that now prints source files and line numbers (#5312)
* Made .deb packages being built using the RelWithDebInfo build type (#5344)
* Fixed a bugs with empty repaint regions during PDF text selection, text search
  and while using the vertical tool (#5348, #5343, #5393)
* Fixed stroke replacement preventing a crash while the app is hanging (#5366, #5362)
* Fixed wrongly sized loading pages (#5399, #5102)
* Improved error checks for saving operations avoiding corrupt autosave files \ 
(#5361, #4934)
* Fixed OK button sensitivity in the PDF page selecction dialog (#5441)
* Added undo handler for missing PDF replacement (#5443, #5435)
* Fixed a filesystem error on MacOS when a document is autosaved the first time \ 
(#5485)
* Fixed the PDF filter in the Export as PDF dialog (#5490)
* Fixed toolbar management segfault and out of date menu (#5510)
* Fixed a bug with corrupt PDF exports when exporting only part of a document with an
  outline (#5512)
* Enabled font hint metrics in PDF export to improve text alignment (#5454, #5405)
* Added IME support to AppImage (#5520, #5493)