Log Message:
xournalpp: update to 1.2.2.

## 1.2.2

Bugfixes from various community contributors.

* Fixed undefined behaviour due to signal callbacks wrong type (#5057)
* Fixed reference handling of sidebar widgets, fixing crashes and warning (#5083,
  #5074, #4026)
* Default build type is now "RelWithDebInfo" (#5118)
* Fixed error message when trying to open an autosave file (#5140)
* Fixed empty toolbars being shown (#5160, #5051)
* Added a device id check for input sequences, so devices don't interfere with one
  another anymore (#5170, #5116, #5087)
* Fixed a bunch of memory leaks (#5164, #5216)
* Properly read PDF files as binary, fixing some reading issues (#5174, #4740)
* Removed unsafe symbols from document name generation (#5144, #5123)
* Fixed crash when a modification happens outside of the cached pages (#5144,
  #5178, #5162, #5046, #5126)
* Fixed audio output settings being off by 1 (#5205)
* Clarified CrashLog message: deleting the Crashlog will stop the message from \ 
popping up (#5214)
* Fixed a crash when pressing both mouse buttons at once (#5210, #5149)