Ability to add two or more custom columns

**Is your feature request related to a problem? Please describe.**
When I assign a comment to the entry, I add a descriptive name, the location, and the connection type. I would like to have separate columns for those for sorting.

**Describe the solution you'd like**
Ideally, there would be several additional columns available that the user can assign a name to, like "Location", "Connection", or whatever. In lieu of that, adding two additional hard named columns of "Location" and "Connection" would suffice.

**Describe alternatives you've considered**
Right now I add a comment in the form of "Amazon Echo Dot 5 (Living Room, WiFi)" or "APC SUA2200 UPS (Basement, Ethernet)". However this method does not allow sorting by the location or the connection type.

**Additional context**
(none)