Same toot can be opened multiple times

[direc85]

• Go to main page
• Open a toot by tapping
• Tap the same toot again

Expected:

• Keyboard closes and/or the reply area is minimized

Actual:

• The current page is pushed again
• This can be done again and again

There should be a detection not to push the toot page for the same toot we're already viewing.

Additionally, if the same toot is found again later in the page stack, perhaps just fast-rewind back to it?

[poetaster]

Hmmm. It's not 'quite' this clear cut. When you enter a 'conversation', having tapped on the toot, the expectation is to reply to this toot. As it happens, if there is a series, it's unclear what you reply to (unless you tap the very last one). But with a single toot, I expect a keyboard reply prompt. But pushing to the stack again should not happen.

So, I'll focus on suppressing the page stack push (perhaps dialog?)