Calculate the total line height of a text

[rvandoosselaer]

This PR fixes: #363

The totalHeight was calculated using this line:

totalHeight = Math.max(totalHeight, -l.getY1());

This always resulted in totalHeight = 0. I changed the calculation to using the lineHeight of the font and multiplying it by the line count.

totalHeight = font.getLineHeight(block) * block.getLineCount();

Since the new height calculation needs the proper line count, I inversed the order of calling the methods in the update() method. First the line count is set, then the alignment is calculated.

I also added a test case with some different alignment settings: TestBitmapFontAlignment.

[tlf30]

Thank you for the fix!
The code looks good to me but I did not test it, thoughts anyone?

[pspeed42]

It looks like you might be only the second person in the world that has made a change to BitmapText classes without breaking something else. I mean, time will tell, I guess. :) Looks good to me, though (and I'm the only other person whose done it... and I did it by failing 5-10 times before that.)

[stephengold]

Re-target to v3.3.0 due to the risk of breaking existing applications.