Added "more than 0" to CT acquisition type filters. Refs #856

Removed acquisition type choices. Refs #856

Fixing existing CT export tests for ref #856

Removing unicode u markers in CT filters tests, refs #856

Added very basic test for ref #856

Removing tick box acquisition type filter docs. Refs #856. Chart consequences documented in new issue ref #877

Added ref #856 to changes.

Running black on ref #856. Removed changes to charts code - leave that to David!