More TextBlock properties

Covers https://github.com/KSHSK/WAVED/issues/240 - Add font size and text align to text block
I also added all of the priority 2 properties (and a bold flag) for TextBlock. All of these options might make it overwhelming so I need two things:
1. Let me know if any of these properties are overkill and if I should remove them.
2. Let me know if I should reorder the properties in the Properties Panel. I wasn't sure of a good ordering.