- Cleanup columns.py and tables
- Other misc cleanups
- Remove text_field.py from qtlib as it is not used
- Remove unused variables from image_viewer method
* Doing a full match should be safer to avoid partial results which would result in overly aggressive filtering.
* Add new tests to test suite to cover this issue.
* Fixes#903.
* Add testing feature to Exclusion dialog to allow users to test regexes against an arbitrary string.
* Fixed test suites.
* Improve comments and help dialog box.