mate-utils 1.23.0 release

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

mate-utils 1.23.0

• tx: sync with transifex
• Remove trailing whitespaces
• Change url projet's website
• [ci] Add cppcheck html report
• Remove unused variables
• [ci] Remove inkscape, rsvg-convert from requires
• Make inkscape and rsvg-convert optional
• mate-screenshot: Variable is assigned a value that is never used
• gdict-applet: Variable 'detail' is allocated memory that is never used
• logview-prefs: Variable 'removed' is assigned a value that is never used
• [ci] Enable Clang Static Analyzer
• Fix -Werror=cast-function-type with GCC 8
• mate-disk-usage-analyzer: Memory leak
• Improve performance by removing unused assignments
• GEN png icons from svg files
• Update documenters in about dialog
• mate-dictionary: Use g_strjoin to build license text
• Use program-name and title in gtk_show_about_dialog call
• help: update copyright