[Canvas] As a User I want to have a visual feedback for the canvas I'm currently modifying

[heyitsyuliya]

• Display colorful border for a Canvas that is selected
• Reflect that selection in selectedCanvasId in local state of the component
• When the user selects a new canvas, the border on the previous canvas should not be displayed anymore and new canvas should be highlighted
• The border should disappear when the user clicks away from the canvas, but selected canvas ID should stay the same
• Automatically select the canvas and display border when new page is added

Selected:

not selected: