Allow to edit table schema using CKAN Schema Creator

[roll]

Current

After #25 the user is able to infer a schema based on the provided data file:

Step 1

After uploading the file we show Infer

Step 2

After clicking on the Infer above (a modal window)

Step 3

After clicking on the Save above

Improvements

But we'd like to provide also an ability to edit already loaded/inferred schema. UI could be like this (an Edit button could be something like Open Editor etc):

---

After a click on the Edit button we back to the scenario above starting from the Step 2.

The tableschemaUI.EditorSchema fully supports stand-alone schema editing we just need to provide schema as a part of props instead of source as we do for the inferring.

Tasks

• implement the described improvements
• ensure that resource editing works as expected

[amercader]

This all sounds brilliant @roll. The only thing I'm not sure about is the last bit about allowing to edit a linked schema. Right now the extension does not store remote schemas to allow these to be maintained separately. If users want to edit it they can download it and upload it.

[roll]

Fixes in #25