fix not all model properties getting rendered

- root problem is that the datatype select component
would fail if the data type is not a string
- the user had some properties defined as arrays:
eg: type: ["number"],
- added logic to try/catch the value setting and reset to
string if it errors out.
- also added updated properties iteration to update model
to make sure model properties get updated explicitly during
model save
Changes in this file are related to Protractor PR, not to this PR. Unless I am mistaken?