build: Replace Codelyzer and TSLint with Angular ESLint

Migrate from the deprecated TSLint to Angluar ESLint. Also fix current
linting issues in the code, in particular:

- Use strict equals operators (=== and !==)
- Remove empty lifecycle methods (mostly ngOnInit)
- Output bindings including aliases should not be named as standard dom
  events (submit)
- Async pipe results should not be negated

src/app/home/timeout-dialog/session-timeout-dialog.component.ts

@@ -1,4 +1,4 @@
-import { Component, OnInit } from '@angular/core';
+import { Component } from '@angular/core';
 import { MatDialogRef } from '@angular/material/dialog';
 
 @Component({
@@ -6,12 +6,9 @@ import { MatDialogRef } from '@angular/material/dialog';
   templateUrl: './session-timeout-dialog.component.html',
   styleUrls: ['./session-timeout-dialog.component.scss']
 })
-export class SessionTimeoutDialogComponent implements OnInit {
+export class SessionTimeoutDialogComponent {
 
   constructor(public dialogRef: MatDialogRef<SessionTimeoutDialogComponent>) {
   }
 
-  ngOnInit(): void {
-  }
-
 }

src/app/home/warning-dialog/warning-dialog.component.ts

@@ -1,4 +1,4 @@
-import { Component, OnInit } from '@angular/core';
+import { Component } from '@angular/core';
 import { MatDialogRef } from '@angular/material/dialog';
 import { environment } from '../../../environments/environment';
 
@@ -7,7 +7,7 @@ import { environment } from '../../../environments/environment';
   templateUrl: './warning-dialog.component.html',
   styleUrls: ['./warning-dialog.component.scss']
 })
-export class WarningDialogComponent implements OnInit {
+export class WarningDialogComponent {
 
   title: string;
   content: string;
@@ -19,7 +19,4 @@ export class WarningDialogComponent implements OnInit {
     this.buttonText = environment.warningDialog.buttonText;
   }
 
-  ngOnInit() {
-  }
-
 }