Include a default Initiative column for Initiative URL

Ideas and Epics artifacts have default columns for the Idea or Epic URL.  This idea is to provide the same for Initiatives in Aha.

There are reporting scenarios where sending direct URL links to Aha artifacts is desirable for concise communication and how I have successfully used the Idea URL column.  I'd like to replicate this success with Hills.  URL links are particularly useful when teams are migrating from legacy systems to Aha and need to clean up data.  Pointed links make it easier to find the artifacts needing to be fixed.