Allow text to be vertically centered in text box.

In InDesign, there is an option in the text frame properties, "Vertical Justification", with a "Center" option.

Or, the "baseline shift" option could be split into either specifying a number, as it is now, or specifying "center in text box".

This option is very important sometimes, such as having a tag symbol (e.g. circle) with a label inside that is either 1 or 2 lines high. Right now I have to have 2 paragraph styles (1 for 1-line text and 1 for 2-line text) so the 1 line text is in the middle of the tag, but also the 2 line text is also centered in the tag.