4.15.0

- xsettings: Use CSD for GtkDialogs by default
- settings-manager: Fix XfceTitledDialog layout with CSD
- settings-manager: Drop setting the old header style
- display: Show ratio next to display resolution
- display: Mark preferred mode with an asterisk
- display: Add init function for aspect ratios
- display: Right-align the display ratio
- display: Fixed warning and removed ratio
- display: Improve look of ratio
- display: Fix icon name for primary indicator
- display: Initialize crtc->scalex/y (Bug #15971)
- settings-editor: Add consistent inline-toolbar
- appearance: Only show themes that support Gtk3 (Bug #15849)
- color: Fix crash in add-profiles dialog (Bug #15876)
- color: Conditionally hide info button in add-profile dialog
- color: Add tooltip to profile info buttons
- display: Fix profile matching in xfsettingsd
- display: Assure correct gchar** (Bug #15816)
- keyboard: Improve layout of add-command dialog
- keyboard: Add mnemonics to add-command dialog (Bug #10495)
- Switch to symbolic window-close icon
- Bump libxfce4ui dependency to 4.15.1
- Improve string for session managers
- Ensure the newly labeled 'Xfce Settings Daemon' is translated
- Do not show translation info on --help output
- Translation Updates:
  Albanian, Arabic, Basque, Belarusian, Bulgarian, Catalan, Chinese
  (China), Chinese (Taiwan), Croatian, Czech, Danish, Dutch, English
  (United Kingdom), Finnish, French, Galician, German, Greek, Hebrew,
  Hungarian, Indonesian, Interlingue, Italian, Japanese, Korean,
  Lithuanian, Malay, Norwegian Bokmål, Polish, Portuguese, Portuguese
  (Brazil), Russian, Serbian, Slovak, Slovenian, Spanish, Swedish, Thai,
  Turkish
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