Source Dock 0.4.0

• add docks to the OBS dock menu
• dock now also lock with the OBS lock UI option
• add visible option to the settings window

• Add scene items option
• Fix memory leak in saving and loading (by @norihiro)
• Add chinese (by kirahan)

fix restoring the position of the docks when using multiple docks

• Add settings dialog
• Add option to switch scene by clicking on the scene
• Add option to show if the source is active in the main OBS output

fix crash on closing dock or OBS