[SPARK-7864] [UI] Fix the logic grabbing the link from table in AllJobPage

This issue is related to #6419 .
Now AllJobPage doesn't have a "kill link" but I think fix the issue mentioned in #6419 just in case to avoid accidents in the future.

So, it's minor issue for now and I don't file this issue in JIRA.

Author: Kousuke Saruta <sarutak@oss.nttdata.co.jp>

Closes #6432 from sarutak/remove-ambiguity-of-link and squashes the following commits:

cd1a503 [Kousuke Saruta] Fixed ambiguity link issue in AllJobPage