message: add spacing around encrypt/decrypt textarea
diff: <ngb-tab title="Encrypt" id="encrypt">
  <template ngbTabContent>
  <form>
  - <textarea type="text" class="form-control" id="textToEncrypt"
  + <textarea type="text" class="form-control my-1" id="textToEncrypt"
  required
  [(ngModel)]="textToEncrypt" name="encryptText"
  #name="ngModel"></textarea>
  <ngb-tab title="Decrypt" id="decrypt">
  <template ngbTabContent>
  <form>
  - <textarea type="text" class="form-control" id="encryptedText"
  + <textarea type="text" class="form-control my-1" id="encryptedText"
  required
  [(ngModel)]="encryptedText" name="decryptText"
  #name="ngModel"></textarea>
  @@ -56,7 +56,7 @@ sample:
  property: '{{ '{' }}cipher{{ '}' }}FKSAJDFGYOS8F7GLHAKERGFHLSAJ'
  </pre>
  <p class="alert alert-danger">
  - <strong>Warning</strong>: Before being able to encrypt/decrypt your properties values, configure a strong encryption key in the <code>encrypt.key</code> property.
  + <strong>Warning</strong>: Before being able to encrypt/decrypt your properties values, you will need to configure a strong encryption key in the <code>encrypt.key</code> property.
  <br>When using the JHipster Registry docker image, you can set this with the <code>ENCRYPT_KEY</code> environment variable.
  Note that this property only needs to be set for the JHipster Registry as your applications will retrieve the decrypted values directly from the config server.
  </p>
  