In this forum the topic icons means the following:

- suggestion was implemented. If it's a fairly new topic the feature will be in the new version. If the topic is quite old, the current version already has it.
- suggestion rejected. Explanation should be written in the topic.
- in progress. Working right now or will take a look when have more time.

When suggesting make sure that the feature is not in the program already. Also take a look of things that already was suggested (you can use the forum search too).