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

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

assets/icons/closeQuote_stroke2_corner0_rounded.svg

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