New user constants (#260)

* update users

* update

* With constructed intro feed, only grab 20 random suggested users to avoid perf issues

* Don't 'check for latest' in the feed with the suggestions feed

* Show/hide the welcome banner on account change (close #257)

---------

Co-authored-by: Jay Graber <arcalinea@gmail.com>
Co-authored-by: Paul Frazee <pfrazee@gmail.com>

package.json

@@ -45,6 +45,7 @@
     "lodash.clonedeep": "^4.5.0",
     "lodash.isequal": "^4.5.0",
     "lodash.omit": "^4.5.0",
+    "lodash.samplesize": "^4.2.0",
     "lodash.shuffle": "^4.2.0",
     "lru_map": "^0.4.1",
     "mobx": "^6.6.1",
@@ -102,6 +103,7 @@
     "@types/lodash.clonedeep": "^4.5.7",
     "@types/lodash.isequal": "^4.5.6",
     "@types/lodash.omit": "^4.5.7",
+    "@types/lodash.samplesize": "^4.2.7",
     "@types/lodash.shuffle": "^4.2.7",
     "@types/react-avatar-editor": "^13.0.0",
     "@types/react-native": "^0.67.3",