Feature summary (what you would like to be able to do and where):
A link to the contributions page, a link to check this range and also block link of the calculated range from the CIDR calculator would allow CUs to more quickly review / block a range after using the CIDR calculator. This, in combination with T311018, could allow the CheckUser results page to go from results to calculating the CIDR to blocking all using the same page.

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):
Say a sockmaster uses 3 IPs:

• 1.2.3.0
• 1.2.3.50
• 1.2.3.230

The CheckUser uses the CIDR calculator to find the common CIDR of /24. The CheckUser can then review the contributions page, check collateral on a seperate CheckUser check and then block if appropriate from the calculator. This would reduce the need for multiple tabs.

Benefits (why should this be implemented?):
This would improve the workflow of blocking an underlying range that a sockmaster uses and make the CIDR calculator more useful to CUs.