fixed Donate-button

templates/main.php

@@ -159,7 +159,9 @@ style('passman', 'app');
                     <button ng-click="logout()"><span class="link" >{{'logout' | translate }}</span></button>
                 </div>
                 <div class="donation-container settings-container">
-                    <button class="donation-container"> <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=6YS8F97PETVU2" target="_blank" class="link">{{ 'donate' | translate }}</a></button>
+                    <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=6YS8F97PETVU2" target="_blank" class="link">
+                        <button class="donation-container">{{ 'donate' | translate }}</button>
+                    </a>
                 </div>
                 <div class="settings-container">
                     <div ng-show="session_time_left">