calculate_phase_count AND precision_sensitivity_table requirements

[TNRiley]

The table currently only works search, screened, and final. It would be able to display with only two phases and possibly with four phases such as: search, title screening, abstract screening, and final included.

The tables require these strict terms to be used as well, which goes to @LukasWallrich's comment on another table. Can the argument be changed to allow for any custom term to work?