Overview of changes in Sysprof 50.alpha
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 * Mark chart improvements with filtering and ability to hide mark groups
 * Recording template cleanup and simplification
 * Improved discoverability with additional keywords in appdata
 * Fix compiler warnings for integer conversions
 * Version macros added to libsysprof-capture
 * Counter ring buffer memory cleanup
 * Minimum GTK version bumped to 4.19.4
 * CI build integration updates
 * Translation updates including new languages: Bulgarian, Serbian (Latin), Japanese