Ensure manual image scanning still works if the automatic scanning is turned off

[dkotter]

Description of the Change

If either the Automatically Caption Images or Automatically Tag Images settings are turned off, we still output the manual scan/rescan buttons when editing an individual image. But those buttons don't work, as we check the aforementioned settings when making a request to get image details and if those settings are disabled, we don't request the proper image details.

This PR fixes that, so if manual scanning is triggered, this overrides the automatic setting, so even if that setting is turned off, the manual scan will still work. Automatic scanning for newly uploaded images still respect that setting though, this only applies to manual scans.

Alternate Designs

We could remove the manual scan buttons all together if the automatic scanning is turned off

Benefits

Manual scanning works properly even if the automatic scanning is turned off. At the moment, those buttons show but won't work properly

Possible Drawbacks

None

Verification Process

1. Setup the plugin
2. Turn off the settings for either Automatically Caption Images or Automatically Tag Images (or both)
3. Edit an existing image or upload a new one
4. Select that image and in the image modal that pops up, click the button that corresponds to the setting turned off above
5. Processing should work correctly and the spinner should disappear and either alt text is added or tags are added (if either can be found)

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests passed.

Applicable Issues

#232

[dinhtungdu]

Great work! This makes a lot of sense to me.