Release v1.4.26

Release v1.4.25

This a quite important release as we got many good improvements:

1. A Python plugin/API (you can write Remmina plugins in Python now!!!) @ToolsDevler
2. X11 Forward for the SSH plugin @marco.fortina
3. Kiosk improvements and new command lines options @marco.fortina
4. And many more see the details just after!

List of changes

• Fix trial for 2577: Closing a VNC connection makes Remmina close all other... !2391 (merged) @PHWR
• Handle after-auth connection errors in VNC properly !2390 (merged) @lorenz
• Using Remmina from command-line for kiosked servers !2392 (merged) @marco.fortina
• Manual page refactoring fixes #2056 (closed) !2393 (merged) @antenore
• Add mutex to protect RDP clipboard->srv_data. Fixes #2666 (closed) !2395 (merged) @giox069
• SSH Forward X11 !2397 (merged) @antenore
• Add '--no-tray-icon' command-line option !2398 (merged) @marco.fortina
• Python plugins !2399 (merged) @ToolsDevler
• Apply plugin api changes from Python plugin change !2400 (merged) @ToolsDevler
• Extract python plugin !2401 (merged) @ToolsDevler
• Make FreeRDPs TLS Security Level setting accessible in the advanced settings view !2402 (merged) @antenore
• Disable grabs for SSH and SFTP, #closes #2728 (closed) !2403 (merged) @antenore
• Cannot disable shared folder !2404 (merged) @antenore
• Use PyInitializeEx in order to skip signal handler registration !2405 (merged) @ToolsDevler
• Ignore add new connection button in kiosk mode !2406 (merged) @antenore
• WWW plugin refactoring !2407 (merged) @antenore

Developer checklist

• Did you change the version in CMakeLists.txt, data/desktop/org.remmina.Remmina.appdata.xml, po/remmina.pot and Doxyfile ?
• Did you update the CHANGELOG.md file ?
• Did you update the authors list in data/ui/remmina_about.glade ?

/cc @bkohler @larchunix @slaanesh @jweberhofer @tukusejssirs @kingu @ToolsDevler @raghavgururajan @marco.fortina