When meta sheet is deleted, prompt the user what they like to do about webgme HOT 4 CLOSED

This is a feature not a bug and originates from a design decision. The WebgGME client could not determine the children-types for the object in focus without walking down to the leaves of the inheritance hierarchy. This could potentially mean downloading the entire project to the client. Therefore, a well defined categorization/barrier needs to be drawn by explicitly defining the meta member objects.

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This is not a feature. It might be a design decision, but i'd rather call it design flaw. In the current state the information in the UI and DB are contradicting. The meta objects are all defined, they are all descendants of the FCO through inheritance.
What i'd say that a proper meta framework has to be built that supports querying the meta information in the DB to tell what can be placed into the current model and also checking the compliance of the current model.

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Even if you would be able to quickly query your model without downloading it then still you could get possibly thousands of objects which would be tough to put on screen to select as a base for your new node ( as you can re-instantiate any instance of a type) and this also means that it would not help the user.
On the other hand you have the ability to create instance from any object allowed on the given sheet (just drag and drop it from the tree-browser).

So I would say that this (and the part-browser as well) function is only a visual helper and this design decision seemed the most cost-effective / user-friendly at the time (I think it still is).

p.s.: the meta info is there it just simply not directly specifies all the possible, already existing types that can be created on a level but telling what are the base-types that are allowed there.

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Deleting a meta sheet could be ambiguous, what should be done.

1. if all elements are included on at least another meta sheet, then just delete the meta sheet
2. if at least one element (e.g. X and Y) is not included any other meta sheet then offer a few options to the user
   • Delete the meta sheet and delete all meta rules for (X and Y)
   • Cancel the delete operation and do not delete the meta sheet.

Not implemented within the scope of this issue. This change will result in rewriting the current confirm dialog.

• Delete the meta sheet and keep all meta rules for (X and Y)
• Delete the meta sheet and keep the meta rules for some object (X) and delete for other ones (Y)

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