Implemented resource renaming.

Created a new class called ResourceListBaseItem which all the items that are placed into the ResourceListContainer inherit from. The rationale being there was starting to be a fair bit of stuff that was shared by both the header and the list items. This also allowed for methods indicating which could be removed or renamed.
Added functionality to the Delete Resource button.
Added enabling and disabling of the delete and rename buttons based on the new methods added by the ResourceListBaseItem.
Linted the changes made by delete-resources.
Merge pull request #33 from AllTheDucks/delete-resources

Implemented resource renaming.