Add LinkBatch to Special:TrackingCategories

When building the table, each cat and message link results in a database
query. Avoid this by using a LinkBatch

Change-Id: If9e39a94c94b0c2e07822a3fa6cce3a22875d7cf
Break long lines

Change-Id: I8d4e883058c21023273df88439cd145888833115
Merge "Add LinkBatch to Special:TrackingCategories"