Align list items, dont process selected item twice if changed in event loop, mouse button events should only occur when pressing left mouse button

include/GsrInfo.hpp

@@ -8,6 +8,7 @@
 namespace gsr {
     struct SupportedVideoCodecs {
         bool h264 = false;
+        bool h264_software = false;
         bool hevc = false;
         bool av1 = false;
         bool vp8 = false;