table column modify not working if column comment is present

Hi guys,
In new version sometimes column modify not working.
I think maybe it's related to this: #2096
For example I give this error when I want rename one field: (other finctionality like set `Unique` and `Default` also not working for me)
```
TypeError: v.trim is not a function[Learn More] main.js:1:250282
```

**/CC:** @wawhal, @praveenweb, @shahidhk 