#Usability - Add "number of files committed" to the "Changes" tab of a Work Item

**Is your feature request related to a problem? Please describe.**
At the top of the Work Item "Changes" view (see attachment), it lists "number of files available to pull", "number of files pulled", but nothing about what I have already committed.

**Describe the solution you'd like**
Add "number fo files committed" and a link on it to open the "Activity History" tab

**Additional context**

Start by locating the Work Item "Changes" tab and its existing file-count labels, then inspect how the "Activity History" tab is opened. Add the committed-file count and make it link to Activity History; done means the count appears alongside the other counts and the link opens the intended tab.

Written by the indexing model from the issue text.