Log Message:
(editors/xournalpp) Updated 1.0.18 to 1.0.20

# Changelog

## 1.0.20

More bugfixes.

* Fixed a regression with pdf files that could not be overwritten (#2355)
* Fixed page layout update after inserting or deleting a page, changing the page \ 
layout or zooming (#1777, #2346, #2411)
* Fixed incorrect rendering of pages after changing the page format (#2457)
* Fixed blocked scrolling after saving a file (#2062)
* Fixed presentation mode after startup (#2413)

## 1.0.19

More bugfixes and improvements due to help from the various community
contributors!

* Changed select object algorithm to be more intuitive
* Added ability for taps with Select Rectangle and Select Region to act like
  Select Object (#1980)
* Improved document loading speed (#2002)
* Added a `--version` command to print the Xournal++ version
* Added a `libgtk` version display to the About dialog
* Added a 16kHz sample rate to audio settings and fixed the 91kHz sample rate
  (#2092)
* Added file version check for future compatibility (#1991)
* Changed wording of new page template dialog to be less confusing (#1524)
* Fixed behavior of "Attach file to the journal" option when choosing \ 
"Annotate
  PDF" (#1725, #2106). This now allows the background PDF and the \ 
annotation files to
  be renamed and moved as long as they 1) share the same file prefix; and 2)
  share the same relative path.
* Fixed an issue where clicking the X on the replace file dialog would overwrite
  the file (#1983)
* (libcairo >= 1.16 only): Fixed PDF export crashing when the table of contents
  is empty (#2236).
* Fixed a bug where the PDF background would not update when loading a new
  document (#1964)
* Fixed plugin window causing a crash on Ubuntu 16.04
* Fixed a bug where the icon would not appear correctly on some desktop
  environments (#1892)
* Fixed inconsistent ordering of button keybindings (#1961)
* Fixed the Enter key not confirming PDF export settings (#1977)
* Fixed exported PDF title (#2039)
* Fixed a bug where different page backgrounds can cause PDFs to be exported
  with the wrong backgrounds (#2119)
* Fixed a bug where the page number count would not be updated after deleting a
  page (#2134)
* Fixed selection object tool not working correctly (#2081) / crashing (#2133)
  when there are multiple layers