[Bundle diff] Show only things that will get updated after bundle upload as difference

[mahalakshme]

As is:

Currently say when the newly upload bundle has only one subject type - Individual and the current org has 2 subject types say, Individual and Household, it shows Household in red - gives a sense as if it is going to be removed

To be:

Comparison should happen and display only for entries in the uploaded bundle, since any extra entries in the current org(report cards or concepts) are going to be untouched.

Clarification:

Red appearing when some value updated is fine and expected.