getPluginTrigger() function only loaded the trigger setting but completely ignored the
noTrigger boolean setting.
When noTrigger was enabled and saved as:
- noTrigger: true
- trigger: ""
On reboot, the function would load trigger which was "", but since empty string is falsy
in the fallback expression, it would revert to plugin.trigger || "!" from the
plugin.json manifest, which is "=" for the Calculator plugin.
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