Improve clarity of dataset info page

[simonbray]

The dataset info page located at /datasets/{dataset_id}/show_params could be presented more clearly - some ideas:

Paper-cut level:

• Make it clearer what items are links. For example, the colour of the link text could be made more distinct (I can barely tell the difference) and relevant icons added.
• Make more of the items links:
  • Tool ID can link to the toolshed
  • History ID can link back to the history (/histories/view?id={history_id})
  • Job ID can link to the job rerun page
  • Dataset ID can link to the dataset
  • 'Name' and 'Format' could link to the 'Edit attributes' page
• Datasets can be part of multiple histories, all history IDs should be listed
• Better explanation of what some items mean, e.g. 'Number', 'Dbkey', 'Inheritance chain'. Maybe this can be shown as a mouseover text.

More advanced (need some simple changes on the backend):

• It could be stated if the dataset is part of a collection and if so the collection ID (again with a link)
• It could be stated if the job was created as part of a workflow invocation - if so, workflow and invocation IDs can be provided (with links)