message: require password to export wallet, wording tweaks
  add lock icons to backup and wallet export tools when the wallet is locked
diff: </div>
  <div class="uk-card-body">
  <p *ngIf="wallet.locked">
  - To access backup options, unlock your wallet.
  + <span uk-icon="icon: lock;"></span> Unlock wallet to access the seed/mnemonic.
  </p>
  <p *ngIf="!wallet.locked">
  To backup your wallet mnemonic phrase, <a title="Copy Mnemonic To Clipboard" ngxClipboard [cbContent]="seedMnemonic()" (cbOnSuccess)="notifications.sendSuccess('Wallet mnemonic copied to clipboard!')" uk-tooltip>click here</a> to copy it to your clipboard.<br>
  <div class="uk-card-header">
  <h3 class="uk-card-title">Export Nault Wallet</h3>
  </div>
  + <ng-container *ngIf="wallet.locked else walletUnlocked">
  <div class="uk-card-body">
  - Use this export tool to simplify wallet transfer to other devices. Your data will be encrypted by your password, and then imported into Nault on your new device!
  - The export does not contain your address book.<br>
  + <span uk-icon="icon: lock;"></span> Unlock wallet to access the export tool.
  + </div>
  + </ng-container>
  + <ng-template #walletUnlocked>
  + <ng-container *ngIf="wallet.password else walletHasNoPassword">
  + <div class="uk-card-body">
  + Use this export tool to simplify wallet transfer to other devices.
  + <br>
  + Your data will be encrypted with your wallet's password, and then can be imported into Nault on any device!
  + <br><br>
  + Note: The export does not contain your address book.<br>
  <div *ngIf="showQRExport" uk-grid>
  <div class="uk-width-1-1">
  <hr class="uk-divider-icon">
  <img [src]="QRExportImg" alt="QR code">
  </div>
  <div class="uk-width-1-2@s uk-width-3-4@m">
  - Scan the QR code on any device to load your Nault wallet!<br>
  + Scan the QR code on any device to import your Nault wallet!<br>
  <br>
  - If you do not have a QR code scanner, you can also import your wallet by using the URL below.<br>
  + You can also import your wallet by using the URL below.
  + <br><br>
  <input type="text" class="uk-input" value="{{ QRExportUrl }}"><br>
  <a title="Copy Export URL To Clipboard" ngxClipboard [cbContent]="QRExportUrl" (cbOnSuccess)="notifications.sendSuccess('Wallet export copied to clipboard!')" uk-tooltip>Copy to clipboard</a>
  </div>
  </div>
  <div class="uk-card-footer uk-text-right@s uk-text-center nlt-button-group">
  <button (click)="exportToFile()" class="uk-button uk-button-secondary uk-width-auto@s uk-width-1-1">Export As File</button>
  - <button (click)="exportWallet()" class="uk-button uk-button-secondary uk-width-auto@s uk-width-1-1">Export QR Code</button>
  + <button (click)="exportWallet()" class="uk-button uk-button-secondary uk-width-auto@s uk-width-1-1">Export As QR Code / URL</button>
  + </div>
  + </ng-container>
  + <ng-template #walletHasNoPassword>
  + <div class="uk-card-body">
  + You need to set a secure wallet password before you can use this export tool.
  </div>
  + </ng-template>
  + </ng-template>
  </div>
  <div class="uk-card uk-card-default uk-margin">
  