QoL improvements

• Reintroduced the help button. I also added the help button to the Tray (in Tray Mode) and moved help to the canvas action panel (in non-TrayMode), because in Obsidian 0.16.0 the status bar hides the help icon.
• Resetting the canvas with the "Reset Canvas" button will now preserve the custom color palette.
• I updated the Set background color of unlclosed line object script. The script will now add background color to open freedraw objects as well. You no longer need to convert freedraw objects to lines before setting the background color. Check the Script Engine library to download the update.

New in Excalidraw Automate

• I added the ColorMaster library to ExcalidrawAutomate. You can get a CM object by calling ExcalidrawAutomate.getCM(<your color comes here>). Color master introduces many new ways to manipulate colors from script. I will publish scripts that make use of this new functionality including supporting videos on my YouTube channel in the coming days.