v2 cleanup (#427)

* refactor: remove useless template

* refactor: handle promise

* refactor: associate labels to fields

* refactor: simplify checking if element exists

* refactor: prevent reassigning

* refactor: avoid wildcard imports

* refactor: simplify imports

* refactor: simplify boolean comparison

* chore: version bump

apps/client/package.json

@@ -1,6 +1,6 @@
 {
   "name": "ontime-ui",
-  "version": "2.0.0-beta",
+  "version": "2.0.0",
   "private": true,
   "dependencies": {
     "@chakra-ui/react": "^2.5.5",