RFR: 8101: Add ignore icon to automated analysis table

[Alex Macdonald]

This short PR addresses JMC-8108 [[0]](https://bugs.openjdk.org/browse/JMC-8101), in which there is no icon for "Ignore" rules in the automated analysis page table. Here there's just a new case added to the switch statement that assigns icons for the table.

Before:
![Screenshot from 2023-07-13 16-57-04](https://github.com/openjdk/jmc/assets/10425301/9bce381d-ee04-4b91-b5fb-4fb103828016)

After:
![Screenshot from 2023-07-13 23-03-55](https://github.com/openjdk/jmc/assets/10425301/62f0b2d4-5d0e-48a6-81ce-4b0c174cdd21)

[0] https://bugs.openjdk.org/browse/JMC-8101

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Commit messages:
 - 8101: Add ignore icon to automated analysis table

Changes: https://git.openjdk.org/jmc/pull/506/files
 Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=506&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-8101
  Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jmc/pull/506.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/506/head:pull/506

PR: https://git.openjdk.org/jmc/pull/506