Validate CSV File exists on connector creation

If you add a CSV connector, and in the file path you put a CSV that doesn't exist, the workflow is a bit unfriendly. It creates the connector (which isn't obvious), but redirects you to the homepage with the following screen:

This seems to happen because it tries to load the CSV file to get the schema but can't.
I feel like it would be better to validate the file exists when creating the connector. If it doesn't, either throw an error that stops creation - or still show the connector page but show a schema error further down.

On another funny note, if you navigate to the connector page after creation, this is what displays:

It has trouble loading the connector image URL - it puts something really really funny into the image link:

<img alt="Unify.Connectors.CSV - The CSV connector allows for manipulation of a source CSV file. Useful for solution testing." class="AutoThumbnail" src="1b175bc1-da20-4064-9d74-d43e5744931f.connector" style="vertical-align: middle;" title="Unify.Connectors.CSV - The CSV connector allows for manipulation of a source CSV file. Useful for solution testing.">

Only fixes when you go into "edit connector" and "save". Saves successfully and shows the correct image after (even if the csv file still doesn't exist).