Add a globals homebox setting(s page) to define available colors

I think this is a good exercise for @LRWebks. Please
1. Add a global settings page at /admin/structure/homebox_type/settings
2. Add a tab for the settings page
3. Add a text area which defines the colors that can be used for the portlets in the format COLOR|LABEL per line:
"Available portlet colors":

#FF0000|Red
#000000|Black
#FFFFFF|White
purple|Purple

The first value is just being passed as-is, so it allows all CSS defined colors. The label on the right is shown for the selection
4. Adjust the implementation of getColorOptions() in class HomeboxPortletTypeBase to retrieve the array of available values from this config value
5. Write a simple test to ensure the settings are saved as expected

Starting with this now!

This can go to review now!
@anybody, please review this, and I will get to all your threads along with the one still open.
The test should work, however the other tests and some other parts of the Homebox module appear to be broken right now, which leads to PHPUnit errors that are unrelated to my test.

All threads are resolved!
So it's back to review now!

Perfect, thank you! Merged!

Automatically closed - issue fixed for 2 weeks with no activity.