Update reactions to new design (#2751)

* Replace search strings

* Add expander for reactions view

* lint

* Remove useless list

* Update tests

* lint

* Only shrink buttons on web version, mobile never shrinks

* Revert accidental change.

* Remove border from button

* Tidy up views.

* Finish matching designs.

* Fix height

* Remove a unneeded class

* Remove more cruft

* Remove unnessacery chunk

* Evenly space reactions

* lint

* Disable reaction buttons when busy

* Try to make menu a bit more responsive

* Update test

* further screen size tweaks

locales/en-GB/app.json

@@ -4,19 +4,19 @@
   },
   "action": {
     "close": "Close",
-    "close_search": "Close search",
     "copy_link": "Copy link",
     "edit": "Edit",
     "go": "Go",
     "invite": "Invite",
     "lower_hand": "Lower hand",
     "no": "No",
-    "open_search": "Open search",
     "pick_reaction": "Pick reaction",
     "raise_hand": "Raise hand",
     "raise_hand_or_send_reaction": "Raise hand or send reaction",
     "register": "Register",
     "remove": "Remove",
+    "show_less": "Show less",
+    "show_more": "Show more",
     "sign_in": "Sign in",
     "sign_out": "Sign out",
     "submit": "Submit",
@@ -62,7 +62,6 @@
     "preferences": "Preferences",
     "profile": "Profile",
     "reaction": "Reaction",
-    "search": "Search",
     "settings": "Settings",
     "something_went_wrong": "Something went wrong",
     "unencrypted": "Not encrypted",
@@ -128,7 +127,6 @@
   "rageshake_sending": "Sending…",
   "rageshake_sending_logs": "Sending debug logs…",
   "rageshake_sent": "Thanks!",
-  "reaction_search": "Search reactions…",
   "recaptcha_caption": "This site is protected by ReCAPTCHA and the Google <2>Privacy Policy</2> and <6>Terms of Service</6> apply.<9></9>By clicking \"Register\", you agree to our <12>End User Licensing Agreement (EULA)</12>",
   "recaptcha_dismissed": "Recaptcha dismissed",
   "recaptcha_not_loaded": "Recaptcha not loaded",