widgetexplorer: Check applet folder creation time instead of metadata.json
Original commit message(s)
- widgetexplorer: Check applet folder creation time instead of metadata.json
On distro updates the file can be created anew and so every applet be presented as new.
Reason for the change
On some distros (at least Neon, so probably at least all apt using distros) the files seem to be totally created new when updating.
Test plan
Reinstall plasma-workspace or kdeplasma-addons package on Neon