Changing denomination in settings causes "undefined" value in UI

[matteyu]

Describe the bug
If the base denomination is set to something else (for example uatom) and you change the bondDenom and denom (within coins) to ubob in the settings.json file, you will get an undefined value in the UI. This will happen if it does not match the base denom from your cosmos daemon

To Reproduce
Steps to reproduce the behavior:

1. Change bondDenom and denom (within coins) in settings.json to (for example) ubob (keeping uatom in your cosmos daemon)
2. Start BigDipper

Expected behavior
Denomination should be ubobm and not "undefined".

Additional context
There should be an option to change the display of the base denomination (micro denom) just like how you can change "ATOM" to something else.

[kwunyeung]

Thanks for reporting. I think we should test if the bondDenom exists in the coins object.