Make manual eslint fixes

These are safe fixes, more complicated fixes can be done separately
(just disabled those errors for now).

- Reorder declarations to fix `no-use-before-define`
- Rename parameters for `no-shadow`
- Remove unused parameters, functions, imports
- Switch from `++` and `—` to `+= 1` and `-= 1` for `no-unary`
- Use object spreading instead of parameter reassignment in auth utils
- Use `window.location` instead of `location` global
- Use inline JSX strings instead of unescaped values
-

web/src/app/Connection.js

@@ -1,7 +1,14 @@
+/* eslint-disable max-classes-per-file */
 import { basicAuth, bearerAuth, encodeBase64Url, topicShortUrl, topicUrlWs } from "./utils";
 
 const retryBackoffSeconds = [5, 10, 20, 30, 60, 120];
 
+export class ConnectionState {
+  static Connected = "connected";
+
+  static Connecting = "connecting";
+}
+
 /**
  * A connection contains a single WebSocket connection for one topic. It handles its connection
  * status itself, including reconnect attempts and backoff.
@@ -63,7 +70,7 @@ class Connection {
         this.ws = null;
       } else {
         const retrySeconds = retryBackoffSeconds[Math.min(this.retryCount, retryBackoffSeconds.length - 1)];
-        this.retryCount++;
+        this.retryCount += 1;
         console.log(`[Connection, ${this.shortUrl}, ${this.connectionId}] Connection died, retrying in ${retrySeconds} seconds`);
         this.retryTimeout = setTimeout(() => this.start(), retrySeconds * 1000);
         this.onStateChanged(this.subscriptionId, ConnectionState.Connecting);
@@ -108,10 +115,4 @@ class Connection {
   }
 }
 
-export class ConnectionState {
-  static Connected = "connected";
-
-  static Connecting = "connecting";
-}
-
 export default Connection;