Add menu item to load a file as your image / drawing

[robertecurtin]

Overview

My friend had an issue with their browser and lost progress, so I put together a build that allowed them to load an image. I'd like to propose this as a full feature, I'm willing to workshop it as needed.

This adds a menu option File->Load Saved Drawing menu item, which does what File->Open Goal Image does but for the user's image canvas. That way someone who loses progress or changes to another computer / browser can carry their image progress.

You can try out the changes here: https://robertecurtin.github.io/jspaint/

Key changes

• Updated in-app documentation
• Added File->Load Saved Drawing menu item, which does what File->Open Goal Image does but for the user's image canvas
  • Added pop-up confirming that you want to do this, in case people confuse this with File->Open Goal Image

Testing

• Opened a file larger than the canvas space, observed that the image was cut off and additional checks were not awarded
• Opened a file smaller than the canvas space, observed that the image filled in as much as it could and left the rest of the canvas untouched
  • This is a little strange, but probably desirable
• Confirmed that cancelling the dialog results in no change to the canvas and returns to the app

Questions for Mario

• I went with the word "drawing" because that felt more clear than "your image", does that name make sense?
• Should this be tied to an archipelago setting? You can use it to cheat, so some people might not want to play with it available