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/services/htmlStorage.service.ts

@@ -5,7 +5,7 @@ import { ConstantsService } from 'jslib/services';
 export class HtmlStorageService implements StorageService {
     private localStorageKeys = new Set(['appId', 'anonymousAppId', 'rememberedEmail', 'passwordGenerationOptions',
         ConstantsService.disableFaviconKey, 'rememberEmail', 'enableGravatars', 'enableFullWidth',
-        ConstantsService.localeKey, ConstantsService.autoConfirmFingerprints,
+        ConstantsService.themeKey, ConstantsService.localeKey, ConstantsService.autoConfirmFingerprints,
         ConstantsService.vaultTimeoutKey, ConstantsService.vaultTimeoutActionKey, ConstantsService.ssoCodeVerifierKey,
         ConstantsService.ssoStateKey, 'ssoOrgIdentifier']);
     private localStorageStartsWithKeys = ['twoFactorToken_', ConstantsService.collapsedGroupingsKey + '_'];
@@ -26,6 +26,12 @@ export class HtmlStorageService implements StorageService {
         if (vaultTimeoutAction == null) {
             await this.save(ConstantsService.vaultTimeoutActionKey, 'lock');
         }
+
+        // Default theme to match the browser if the theme isn't set
+        const theme = await this.get<string>(ConstantsService.themeKey);
+        if (theme == null) {
+            await this.save(ConstantsService.themeKey, 'themeDefaultSet');
+        }
     }
 
     get<T>(key: string): Promise<T> {