QUASAR: Restructure canvasElements to highlight number, add delete

One click delete is now added to the nodes in the form of a red box with an
'X'.  Modified the box containing the node count to allow a less 
obstructed view of the number itself.

#12
QUASAR: Offscreen indicators for the corners

Some brute force CSS to create offscreen indicators for the corners. Going
to clean it up in next commit, that whole file can certainly do with some
spring cleaning, as it were.

#12