ANNOUNCE: libxfce4ui 4.15.1 released

[Simon Steinbeiss]

libxfce4ui 4.15.1 is now available for download from
  
  https://archive.xfce.org/src/xfce/libxfce4ui/4.15/libxfce4ui-4.15.1.tar.bz2
  https://archive.xfce.org/src/xfce/libxfce4ui/4.15/libxfce4ui-4.15.1.tar.bz2?sha1
  https://archive.xfce.org/src/xfce/libxfce4ui/4.15/libxfce4ui-4.15.1.tar.bz2?sha256


What is libxfce4ui?
===================

Libxfce4ui is used to share commonly used Xfce widgets among the Xfce
applications.

Website: 
  https://www.xfce.org/


Release notes for 4.15.1
========================
This release introduces the following features:
- Switch XfceTitledDialog to headerbar/CSD layout
- Use GtkMessageDialog as base class for Xfce Dialogs
- Add two new functions to search for app icons
- Improve Tests and Docs

Full changelog:
- Switch XfceTitledDialog to headerbar layout
- XfceTitledDialog: Keep buttons in the action area
- XfceTitledDialog: Also repack xfce_titled_dialog_new
- XfceTitledDialog: Make sure windows can be dragged
- XfceTitledDialog: Add _create_action_area, _add_button
  and _add_action_widget
- Introduce xfce_titled_dialog_set_default_response
- Mark xfce_titled_dialog_new_with_buttons as deprecated
- Add two new functions to search for app icons
- xfce-about: Fix Makefile
- shortcut-dialog: Show dialog content (Bug #16338)
- xfce-dialogs: Use GtkMessageDialog as base class
- xfce-dialogs: Improve layout of confirm_close_tabs
- xfce-dialogs: Improve alignment and layout of dialogs
- xfce-dialogs: Add right margin back to labels
- xfce-dialogs: Drop default window titles
- docs: Add xfce_dialog_confirm_close_tabs
- tests: Add xfce_dialog_confirm_close_tabs
- tests: Improve UI
- tests: Add icons to dialog buttons
- tests: Simplify code by using XfceTitledDialog
- tests: Re-order buttons
- tests: Fix typo in test-ui.c (Bug #16253)
- Rename test-ui-gtk3 to test-ui
- Improve docstrings
- Fix typos
- Drop gladeui Gtk2 from distcheck options
- Drop unused declaration
- Fix compiler warnings
- Remove trailing whitespace
- Always provides needed files for vala binding in dist tarball
- Add recents functions to libxfce4ui.symbols
- Drop xfce-header from pot files
- Update docstrings
- Fix license text box too small (Bug #16259)
- .gitignore: ignore all .o files
- Make autogen output friendlier
- Translation Updates:
  Albanian, Bulgarian, Catalan, Chinese (China), Croatian, Danish,
  Dutch, French, Galician, German, Hungarian, Italian, Japanese,
  Lithuanian, Norwegian Bokmål, Polish, Portuguese, Portuguese
  (Brazil), Russian, Serbian, Slovak, Slovenian, Spanish, Swedish,
  Turkish, Ukrainian