Mobile Multiple Selections Concept

This is one of those "ideas that came to you when you are almost asleep".

On the desktop, we use a mouse cursor to perform multiple selections by grabbing an area of the screen. We don't have that luxury on mobile however.

Thus came this concept. Inspired the flood fill concept in this write-up:
http://inventwithpython.com/blog/2011/08/11/recursion-explained-with-the-flood-fill-algorithm-and-zombies-and-cats/