make conversion menus dynamic

[huss]

Is your feature request related to a problem? Please describe.

The conversion create page checks for a number of undesirable conditions. Most of the modal pages have React hooks to dynamically change the menus so the admin cannot make that selection. For example, once a source or destination is selected then it should be removed from the other menu. Another example is not allowing meter units to be a destination (this one is static).

Describe the solution you'd like

Make the conversion menus use React hooks and modify menus as needed.

Describe alternatives you've considered

The current fix of testing after selection. Many can be removed if this is done.

Additional context

None

[qnhn22]

I would like to work on this issue. Thank you!