Fix scene transition occurring twice on double-click
Fix infinite loop if no name change results in two folders with same name
Save scene tree folder expanded state on program close
Add right-click option to add folder
Added Portuguese Brazilian translation thanks to msmafra
Added option to display scene and/or folder icons
TreeView now supports the OBS Studio Mode "Transition to scene when double-clicked" option. When this option is enabled, double clicking on a scene transitions the active scene instead of editing the name.