Improve input constraints; general usability improvements

[ohltyler]

Description

This PR covers a bunch of general usability improvements:

• refactors the delete workflow modal into the workflow list module
• updates the delete workflow modal by adding deprovisioning as an option (and setting it as the default) when deleting workflows from the list page
• adds a 'failed to find workflow' dedicated page due to invalid id in url, for example
• adds more loading state and visibility when deleting
• adds input limits - max 1000 documents, max 100 chars for string, max 10000 chars for json string
• adds regexp matching and character limit handling when defining workflow name from the new workflows page
• adds getCharacterLimitedString() util fn to dynamically truncate strings if beyond the specified limit and adds an ellipses. Audited the entire plugin to ensure the workflow name, for example, is displayed properly, if the name is very long.
• adds xss checks by sanitizing all scenarios when parsing url params
• adds loading state to importing
• makes JSON editor full-width

Demo video, showing the updated delete modal, invalid url page, and some general input handling checks.

screen-capture.26.webm

Issues Resolved

Makes progress on #23
Makes progress on #295

Check List

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