New Features for MDDataTable

[gfreundt]

Description of the Feature

Hello, I have been using MDDataTable quite frequently and would like to suggest a few features to add:

• configure row height (fixed or automatic dimensions according to font size and or internal padding)
• configure not highlighting row on mouse hover and only on mouse click
• allow the python code to select (and highlight) a different row programatically
• option to align text within each cell

Thanks, Gabriel

[HeaTTheatR]

@gfreundt You can make your PR. But it will be merged only after we have tests for the MDDataTable class.