Canvas tools

[yongzhez]

Created a horizontal action menu with pencil, marker and eraser. Can pick a color with the color button as well. Now saves all this data to the server as well. @vecuenca

[vecuenca]

Everything looks good. Two minor things:

• can you make the icons white instead? i feel white would blend in better with the rest of the theme
• the lines that the marker draws look a bit choppy, is it possible to make them smoother?

[yongzhez]

two big bugs:

• the eraser overwrites the color until you change the color manually
• the messages aren't populating

[yongzhez]

what the icons currently look like