Disable update milestone button if no changes.

[afrisalyp]

#2555

[maxceem]

Hi @afrisalyp generally works good.

There is just one case to handle:

• when we edit some field button becomes active as expected
• after I click Close button - so I'm not saving what I edited
• when I open the form again, all the values are reset like from the beginning without my edits, but the button to update is active, it should be disabled, as no values are changed

See screencast https://monosnap.com/file/1kyGVb9mQq3laMB7i4H5xjKuxcG1i5

Also, I've added one more comment regarding performance, please have a look.

[afrisalyp]

@maxceem,
I'm working on the issue.
And I've also replied the comment on the line.

[afrisalyp]

Hi @maxceem
Please take a look for the new commit.
It resolves the issues of the resetting the state and the performance issue.

Thanks.

[maxceem]

@afrisalyp your approach fixes a possible performance issue. And everything works good.
Thank you!