Show "System" metadata to the user.

[KellyMWhitehead]

Background

Most 'things' in QRiS have metadata, which is JSON stored in a metadata field. This has evolved over time and I now store three types: 'system', 'metadata' and 'attributes' in the metadata json.

• metadata is 'user' provided metadata. They can add edit and delete any 'metadata' entry. (I regret using the term 'metadata' here - should have called this 'user'). The metadata widget loads this in the table that you see in many of the QRiS forms.
• 'system' is metadata that are managed or needed by QRiS, or should be 'read-only'. They currently are not exposed to the user (hence the purpose of this ticket). For example, the centerline tool creates a few entries that specify the polygon source used to create the centerline, smoothing tolerance, etc. We do not want the user to change these, but some users might want to view this information.
• 'attributes' used mainly by dce_points etc. to store attribute values.

Question How would we like to expose these read-only 'system' type metadata values? The metadata tab currently looks like this:

• add these to the current table as read-only? Could cause confusion as to why read only/clutter up the table. If we go this route maybe have a toggle to hide/show system metadata.
• a button that pops open a new table/window? Cleaner, but kind of buries the information and adds more mouse clicks.
• its own separate tab? Don't really like this option as it adds more tabs that have to be managed on each form rather than through the MetadataWidget

[KellyMWhitehead]

Ready for release 1.0.2.

1) Checkbox at bottom shows/hides the read-only qris system metadata. System metadata not displayed by default.

2) Also made the delete button enable only if a row is selected and it is not a system metadata.

3) This is subtle, but when you click add, the edit cursor for the key becomes active.