This is another refactoring in the multi-step process to remove all uses
of our custom Render Buffer.
Previous commit: 006e5904be in this
series.
This commit affects the icons next to the topic title that indicate if
it is closed, unlisted, pinned, etc. It is just a refactor and should
not change any functionality.
Originally I was going to continue to use the existing
topic-status-icons arrayProxy helper but this would require using
observers, so I opted instead to use computed properties and have a bit
larger hbs template.
1c7305c0f1