Changes in the Permissions design:
1. If the collectible is unique the amount input is disabled. 1 is auto-selected
2. Show `Max. 1` for unique tokens and empty string for other tokens
Changes in the Airdrop design:
1. Show `Max. 1` for unique tokens
- remove padding and use margins so that the listview can span the whole
width while having the scrollbar neatly next to it
- make the section header both inline and floatable (which makes it
always visible, even when scrolled away)
- fix the special search results "section" to behave the same way
- sort the results by category and name
- expose the `allTokensMode` for easy testing with storybook
Closes#10201
Michał Cieślak
Alex Jbanca
Lukáš Tinkl
Noelia