Fix element selectors fix #368

[NINI1988]

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change? (check one)

• Yes
• No

If yes, please describe the impact and migration path for existing applications:

The PR fulfills these requirements:

• When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)
  fixes Fetch more messages does not work with multiple chat windows #368
• All tests are passing

[antoine92190]

Why did you remove footerHeight? It's useful in case we want to show emojis, templates, after adding images to a message.

[NINI1988]

My Firefox says, that property bottom has no affect on that element, because it's static or something like that. Maybe I missed something, but have you tried it?

[antoine92190]

Yes I have tried it and it breaks the emoji / tags / templates UI

[NINI1988]

I have disabled the file upload in my application, maybe that's the difference. Without an image it works as expected. I will fix it when I have time.

[NINI1988]

It works in firefox and chrome as expected. Which browser do you use and how does it look like?

[antoine92190]

Actually it works, I don't know what happened last time...