Scene Tree Folder plugin for OBS Studio 0.1.5

Update plugin to work with OBS 28.
Folder structure is now preserved over scene collection rename.

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.