Present in-app browser as sheet (#5718)

* use page sheet presentation

* move to its own file rather than sitting in prefs

* whoops, missed one

src/view/com/post-thread/PostThreadItem.tsx

@@ -13,6 +13,7 @@ import {msg, Plural, Trans} from '@lingui/macro'
 import {useLingui} from '@lingui/react'
 
 import {MAX_POST_LINES} from '#/lib/constants'
+import {useOpenLink} from '#/lib/hooks/useOpenLink'
 import {usePalette} from '#/lib/hooks/usePalette'
 import {makeProfileLink} from '#/lib/routes/links'
 import {sanitizeDisplayName} from '#/lib/strings/display-names'
@@ -22,7 +23,6 @@ import {niceDate} from '#/lib/strings/time'
 import {s} from '#/lib/styles'
 import {POST_TOMBSTONE, Shadow, usePostShadow} from '#/state/cache/post-shadow'
 import {useLanguagePrefs} from '#/state/preferences'
-import {useOpenLink} from '#/state/preferences/in-app-browser'
 import {ThreadPost} from '#/state/queries/post-thread'
 import {useSession} from '#/state/session'
 import {useComposerControls} from '#/state/shell/composer'