Fix responsive bug top navigation

Hi,

I have found and fixed a minor layout bug (responsive)

This is the situation before the fix:
![before](/uploads/55bf61a64fb49a763c5f8381bf46d390/before.png)

And this is the situation after the fix:
![after](/uploads/33ba091156d404e52c41f134121c59f0/after.png)

See merge request !3190

Move group activity feed to separate page for consistency with dashboard
and project pages

Fixes #14161. Part of #13480 

See merge request !3157

Improved search results filter dropdown

## Current

Currently filter dropdowns on search results page can be **very** long and off the page

![Screen_Shot_2016-03-11_at_15.25.24](/uploads/3418b0a6f4f8a0a8bd2441b53502c574/Screen_Shot_2016-03-11_at_15.25.24.png)

## New

Changed over to the new dropdown

![Screen_Shot_2016-03-11_at_15.29.06](/uploads/2d3a4a9b3e50f3e0fc1748a026cd5905/Screen_Shot_2016-03-11_at_15.29.06.png)

See merge request !3183

Updated UI of award emoji

Closes #13878 

See merge request !3028

Fixes issue with issue sidebar toggle button not working

Closes #14195

See merge request !3165

Account settings

Closes #13854

![](https://gitlab.com/gitlab-org/gitlab-ce/uploads/4802a7b4f74f17d25a611ed1a2200445/account-settings.png)

See merge request !3039

Added discard button to comment form

Also changed the labels on the buttons to better match the action they are completing.

Closes #8057

See merge request !3085

Add error for ajax:error when submitting comments

Fixes #13814
![Screen_Shot_2016-02-25_at_1.54.56_PM](/uploads/d70d706d306079df1b00d70f09affb63/Screen_Shot_2016-02-25_at_1.54.56_PM.png)
cc @dblessing 

See merge request !2976