1. load an unpacked (local) extension
2. edit the manifest.json to have a letter in the version (like 1.0b)
3. reload the extension using the spin icon button
4. an error message is displayed
5. dismiss the error message
6. fix the version number (remove the letter), increment the version number instead
7. optional: the extension may be disabled, even if the extension is re-enabled the problem persists

problem: the reload button is not available. The reload icon button should be available so I can reload with the fixed version

workaround: load the unpacked extension again (i.e. from scratch, not using the reload button).

Priority 2 because this breaks the easier edit-reload-test development cycle.