eom 1.23.0 release

Changes since the last release: v1.22.1...v1.23.0

eom 1.23.0

tx: sync with transifex
require GLib 2.52
Update FSF address
Restore image types list and add wildcard
Disconnect callbacks for "Open with" menu items before connecting new ones.
Unref GtkUIManager so "Open with" menu is freed.
[ci] Add cppcheck html report
update image of eom_toolbar_editor_window
Use ITS in docbook article info, validate with dbits schemas
store: Add any image file in the current directory to the store
Simplify the installation process of the icons
enable clang analyzer
help: update copyright
Upgrade the manual to docbook 5.0
Use persistent page setup