When a Buttercup CSV with extra properties is saved, every possible extra property key is imported into all entries, even if the entry doesn't define the extra property.
This PR adds a check when importing the Buttercup CSV to ignore extra properties that don't have a value. This prevents empty extra properties from showing up in the UI after an import.
Fixes #69
When a Buttercup CSV with extra properties is saved, every possible extra property key is imported into all entries, even if the entry doesn't define the extra property.
This PR adds a check when importing the Buttercup CSV to ignore extra properties that don't have a value. This prevents empty extra properties from showing up in the UI after an import.