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/vault/add-edit.component.html

@@ -103,7 +103,7 @@
                         </div>
                         <div class="col-6 form-group totp d-flex align-items-end" [ngClass]="{'low': totpLow}">
                             <div *ngIf="!cipher.login.totp || !totpCode">
-                                <img src="../../images/totp-countdown.png" title="{{'verificationCodeTotp' | i18n}}"
+                                <img src="../../images/totp-countdown.png" id="totpImage" title="{{'verificationCodeTotp' | i18n}}"
                                     class="ml-2">
                                 <a href="#" appStopClick class="badge badge-primary ml-3" (click)="premiumRequired()"
                                     *ngIf="!organization && !cipher.organizationId && !canAccessPremium">