Use ALF for post controls (#3400)

* alf the repost dropdown on web + import icons

* alf like icon

* convert other post controls

* add missing padding to share button

* refine buttons and use better icons

* revert buttonicon changes

* remove ButtonIcon and ButtonText from repost dialog

* use 15px font size when not big

* reduce size and use contrast_25

* add hover state to logged out view

* add `userSelect: 'none'` to buttons

* use width rather than height

* fix quote close behaviour

* prettier

* Fix Esc on repost

* Use new icons for placeholder

* Fix placeholder

---------

Co-authored-by: Dan Abramov <dan.abramov@gmail.com>

assets/icons/repost_stroke2_corner0_rounded.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24"><path fill="#000" fill-rule="evenodd" d="M16.293 2.293a1 1 0 0 1 1.414 0l3 3a1 1 0 0 1 0 1.414l-3 3a1 1 0 0 1-1.414-1.414L17.586 7H5v4a1 1 0 1 1-2 0V6a1 1 0 0 1 1-1h13.586l-1.293-1.293a1 1 0 0 1 0-1.414ZM21 13v5a1 1 0 0 1-1 1H6.414l1.293 1.293a1 1 0 1 1-1.414 1.414l-3-3a1 1 0 0 1 0-1.414l3-3a1 1 0 0 1 1.414 1.414L6.414 17H19v-4a1 1 0 1 1 2 0Z" clip-rule="evenodd"/></svg>