DYN-6500: disable cancel button if no changes

[dnenov]

Purpose

Addressing this jira https://jira.autodesk.com/browse/DYN-6500 issue. Disable the Cancel button if no changes are made to the current package publish form.

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated
• This PR contains no files larger than 50 MB

Release Notes

• if there are no changes, disable the cancel button
• button renamed 'Cancel' to 'Reset'

Reviewers

@reddyashish

FYIs

@avidit

[reddyashish]

@hwahlstrom Should we rename the cancel button here to reset button. This is the task: https://jira.autodesk.com/browse/DYN-6500

[hwahlstrom]

@reddyashish I commented in the Jira task: we could do Reset. If info has been entered, it should trigger the "Discard changes?" confirmation. Could we have an alternative version of the confirmation? It could say "Your changes will be lost if you proceed."

[reddyashish]

@dnenov Can you change that? LGTM with that change.

[dnenov]

Now renamed to 'Reset' guys!