CLC-4201 - Academics: "Active Blocks" has real estate problems

https://jira.ets.berkeley.edu/jira/browse/CLC-4201

Changes:

 * Don't do ellipsis when opening the block information
 * Fix triangle location
 * Adjust the width of the columns
Merge pull request #2888 from christianv/CLC-4201

CLC-4201 - Academics: "Active Blocks" has real estate problems