v0.42.1 release

• support for opening notes in a new window
• tree widget has now an option to hide images if they are included in the parent note (turned on by default) which makes the tree less cluttered
• tabs are now loaded lazily which speeds up initial load of the application
• linux and windows builds are now shipped with portable-trilium script which will set up the trilium-data directory in place
• upgrade CKEditor to version 19 which brings improvements in tables
• protected note switch is now moved to "note action" to declutter the view
• when recording timestamps, trilium uses client timezone instead of server timezone (relevant for server deployments only)
• long code notes are now previewed in read only mode to improve performance
• added "expand subtree" action to the note tree context menu