Theme Support with a Dark Mode (#974)

* Stylesheets

* Theme Configuration

* Options Area

* swal2 style

Missed the swal2 styling and improved the table theming

* Icon styling

* Fix theme not saving

* Update English

Remove colour to make it more translatable between English and American

* Update messages.json

* Login logo

* dropdown and login logo

* btn-link and totp fix

Added a border for extra readability on the btn-link

* Organisation Styling

* Update messages.json

* Update webauthn-fallback.ts

Add missing semicolon and enable console.error bypass for tslint

* Fix contrast issues

Update the blue to match the browser extension and lighten the grey for text-muted variable

* Add Paypal Container and Loading svg file

* Update jslib

* Password Generator contrast fix

src/app/settings/options.component.html

@@ -87,6 +87,17 @@
         </div>
         <small class="form-text text-muted">{{'enableFullWidthDesc' | i18n}}</small>
     </div>
+    <div class="row">
+        <div class="col-6">
+            <div class="form-group">
+                <label for="theme">{{'theme' | i18n}}</label>
+                <select id="theme" name="theme" [(ngModel)]="theme" class="form-control" (ngModelChange)="themeChanged($event)">
+                    <option *ngFor="let o of themeOptions" [ngValue]="o.value">{{o.name}}</option>
+                </select>
+                <small class="form-text text-muted">{{'themeDesc' | i18n}}</small>
+            </div>
+        </div>
+    </div>
     <button type="submit" class="btn btn-primary">
         {{'save' | i18n}}
     </button>