Canvas: CSS like property value inheritance.

Canvas: CSS like property value inheritance.

 - Groups store property nodes for different styles and pass them
   to child elements on creation (No dynamic updates yet)
 - Use StyleSetter map instead of loads of if/else if statements
   for setting element styles.
 - Unify element style properties (Only use one property, instead
   of multiple like it has been with colors)
 - Fix: Create only one element per property node (Was two)