feature: separate senses

[apttx]

saving phrases with several different senses just for one of the senses is frustrating. one now also has to remember which sense they saved it for.

• [x] create, store & show a phrase for each sense
• [ ] research the difference between /-separated & numbered senses

[apttx]

moved to housekeeping as feature exists, but some info-finding chore is still to be done