Add a text filter for the browse page

[craigsapp]

Similar to the "M", "I", and "D" buttons at the top of the page in the navigation toolbar, add a "T" button which will show only works containing text (lyrics):

[craigsapp]

Implemented with commit https://github.com/craigsapp/website-polish-scores/commit/7d367adfb982d60e094aad8112a6f84bce8d8310

Possible enhancement: allow displaying of scores without text as well. This could be done by cycling three times with the "T" icon: white = both texted and untexted music, red = texted music, black = untexted music.

[craigsapp]

Example: