Feature to add a background to Shared Notes activity

[llaske]

It could be nice to add a feature to set the background of the Shared Notes activity.
Currently the background is just white.

This new feature should:

• Add a new icon in the toolbar to select the background from the Journal
• Set the image as the background
• Handle resizing of the background image when the board is resized
• Handle record of the background image when the board is save in the Journal.

[ricknjacky]

@llaske I have tried my hand at this, the new behavior is:-

I am not sure if this matches the expected behavior. As you can see at the end when I add note two notes get added, I am kind of stuck as to why that is happening ;-; I fondly anticipate your feedback on this and guidance on how to troubleshoot that error.

[llaske]

I don't think two notes are added. It look like the control use to set input text is not at the right place: both should be at the same place.

[ricknjacky]

Adding a background and Handling of zoom I've already shared in the previous comment.
Coming to the issue of drag, I had this misconception of dragging the image inside of canvas, hence the grey area in previous comment's gif.

Does this now satisfy the behavior expected?

[llaske]

The grey area is not an issue. It's normal to have a grey (or white) area at some point when the board is moved outside the background image. But the background should move when board is moved.

[llaske]

Fixed in #914