Change helpText from prop to slot in NameAndDescInputModalForm

[KAIMonmoy]

Fixes #1858

This PR chnages helpText from prop to named slot in NameAndDescInputModalForm. It also modifies AddEditSchemaModal to pass the helpText as a named slot to NameAndDescInputModalForm instead of a prop.

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[seancolsen]

Looks good, @KAIMonmoy. I added a couple small commits, cleaning some things up. Take a look at them to see what I did and let me know if you have any questions.

Thanks for this PR! We welcome more contributions!

[KAIMonmoy]

Looks good, @KAIMonmoy. I added a couple small commits, cleaning some things up. Take a look at them to see what I did and let me know if you have any questions.

Thanks for this PR! We welcome more contributions!

Hey @seancolsen , thanks for all the help. I should have taken care of the clean-ups, my bad! I understood what you did in the commits you made.
It felt really great working with you. I would definitely like to contribute more to this project. You can point me to an issue that you need help with or you think is suitable for me, and I'll be happy to work on that.

[seancolsen]

You can point me to an issue that you need help with or you think is suitable for me, and I'll be happy to work on that.

I like your enthusiasm! We'd love to have more help from you!

Here are some ideas:

• Use a URL query param instead of a hash to store the filtering/sorting/grouping/pagination #1785
• No row should be selected when a cell within the placeholder row is selected #1912
• Re-focus table cell after opening record selector on that cell #1892
• Autofocus on input element when a new column is supposed to be added #1830
• Closing the context menu should not pass the click through #1770
• Handle more edge cases when setting the user's cursor after auto-formatting an input #1284