Reactions (#223)

* * Tracking emoji
* Fixed users/rooms regex tracking

* fix

* Autocomplete emoji

* fix

* Emoji picker refactored

* * Scroll edge color effect
* layout fix

* Fix

* Open reaction picker modal

* tmp

* tmp

* Reaction size

* Fixed URL image warning

* * Show reactions of messages
* Messages with a reaction should show a button to add more reactions

* Set reaction

* Toggle reaction

* 'User have reacted' style

* Show who have reacted onLongPress

* Style

* Vibration onLongPress

* Close reaction picker on Android's back button press

* Close emoji when keyboard is open

* lint

* Android layout fix

* performance [1]

* fix lint

* who reacted fix

* :x

* test

package.json

@@ -13,7 +13,7 @@
     "android": "react-native run-android",
     "storybook": "storybook start -p 7007",
     "snyk-protect": "snyk protect",
-    "prepare": "npm run snyk-protect"
+    "prepare": "exit 0"
   },
   "rnpm": {
     "assets": [