Move styles from SugarActivityIcon to SugarCanvasIcon - SL #3989
Move styles from SugarActivityIcon to SugarCanvasIcon - SL #3989

This is because of the generalization made in the toolkit that will
allow to style other icons like the activity icons in the home
favourites view.

Signed-off-by: Manuel Quiñones <6f5069c5b6be23302a13accec56587944be09079@laptop.org>
Acked-by: Simon Schampijer <088e16a1019277b15d58faf0541e11910eb756f6@laptop.org>
Signed-off-by: Ajay Garg <1c58a446a63e719d7b90156a8998ccc461609ed7@activitycentral.com>

ceibal-tatu/sugar-artwork,ceibal-tatu/sugar-artwork,ceibal-tatu/sugar-artwork