Fix UTF8_STRING in registry.txt renders extension unresponsive on Gnome 46 (Wayland)

[Snorch]

The idea of the fix comes from @gentoo-root, @AmeyaVS and @alephnull comments in the original issue:

Changing "UTF8_STRING" to "text/plain;charset=utf-8" in registry.txt seems to be fixing the problem after reloading the extension.

So let's use this.isText() instead of mimetype.startsWith('text/')) in fromJSON text checking.

Without this patch "Text will be here" appears in the tray and extension is unresponsive.

Fixes: #459

[Tudmotu]

Thank you for this, will test it out and release in the next few days 🙏

[TriplEight]

I faced this bug with "Text will be here" and unresponsive extension v62. Then I found fixes https://github.com/Tudmotu/gnome-shell-extension-clipboard-indicator/issues/459#issuecomment-2044686278 and https://github.com/Tudmotu/gnome-shell-extension-clipboard-indicator/issues/459#issuecomment-2138858968.

So I first checked what was in ~/.cache/clipboard-indicator@tudmotu.com/registry.txt and it was empty! The bug is reproducible in this state. The workaround would be:

• remove the empty ~/.cache/clipboard-indicator@tudmotu.com/registry.txt
• restart the extension

To improve the fix I'd recommend checking/restoring the structure of registry.txt.

[Tudmotu]

Apologies for the delay. Pushed to e.g.o. Thank you! :pray: