Adds url input type for View settings fields, converts a few settings to use it

[zackkatz]

This takes advantage of browser validation (related to #2159), while making a very small change.

I considered updating the GravityView_FieldType abstract class to add an input_type and just use the existing GravityView_FieldType_text class, but I determined that this was cleaner.

To test:

In the View editor, test the Delete Entry Redirect URL, No Entries Redirect URL, and Edit Entry Redirect URL settings.

• Add URLs with special characters. Make sure they are saved and stored properly
• Test to make sure redirections are correct

💾 Build file (cd843a7).

[mrcasual]

@Mwalek, please test.

[Mwalek]

@mrcasual @zackkatz I tested the URL input type with different types of URLs to see how it handles them.

Valid URLs like https://example.com and https://192.168.1.1/settings worked fine and redirected correctly. However, it's worth pointing out that the validation isn't perfect. Some invalid URLs, like htp://example.com, https:///path, and https://example..com, were saved instead of being rejected.

Another noteworthy point is that given the new validation, it will not be possible to use user submitted data or GF default merge tags as the redirect URL. For example, the user might have a form field they want to add using a merge tag like so {User Submitted URL:1}, this will no longer be possible.

Finally, users do not get a clear textual prompt if the invalid URL is in a settings tab that they have navigated away from. In such cases, the View is not published/updated but the user does not see a message explaining why. To reproduce, add an invalid URL in the Edit Entry settings, go to a different settings tab, e.g Delete Entry settings tab, try to save your changes.

Summary

• Some invalid URLs are saved.
• Merge tags can’t be used for redirects.
• No error message when invalid URLs prevent saving settings.

[rafaehlers]

The fact that we can't use Merge Tags anymore is a no-go, I think.

[zackkatz]

Closed due to the Merge Tag issue.