Move PreferencesHomeFeed to a screen instead of a modal (#1335)

* move `PreferencesHomeFeed` to a screen instead of a modal

* add web route for home feed preferences

* upgrade `@miblanchard/react-native-slider` to fix lint

* fix web route naming

* fix desktop web styling

* add `react-native-slider` mock

package.json

@@ -36,7 +36,7 @@
     "@fortawesome/react-native-fontawesome": "^0.3.0",
     "@gorhom/bottom-sheet": "^4.4.7",
     "@mattermost/react-native-paste-input": "^0.6.4",
-    "@miblanchard/react-native-slider": "^2.2.0",
+    "@miblanchard/react-native-slider": "^2.3.1",
     "@react-native-async-storage/async-storage": "^1.17.6",
     "@react-native-camera-roll/camera-roll": "^5.2.2",
     "@react-native-clipboard/clipboard": "^1.10.0",