Category selector don't overflow through the search container

[Canapin (Coin-coin le Canapin)]

Hi,

It’s a very minor issue, but it makes my eyes squint each time.

When the results aren’t dynamically loaded yet, the category selector his partially hidden:

[sam (Sam Saffron)]

Thanks, yeah this is a bit tricky to fix due to CSS being very tricky to workaround here, but we will get it sorted.

[pmusaraj (Penar Musaraj)]

We need the truncation for the category badges in the hamburger menu, but the style rule was too broad, it was applying to all menu panels. I restricted it to just the category badges in the hamburger menu in https://github.com/discourse/discourse/commit/aca2697a42e04b3e5cd9c3d354ed6151276a0ab1, should be better now for the search results in the OP.