Update donation links.

_locales/en/messages.json

@@ -150,12 +150,6 @@
     "defaultDonateText": {
         "message": "This utility is fully <strong>open source</strong> and is available free of charge to all <strong>cleanflight</strong> users.<br />If you found the cleanflight or cleanflight configurator useful, please consider <strong>supporting</strong> its development by donating."
     },
-    "defaultDonateConfiguratorText": {
-        "message": "Configurator"
-    },
-    "defaultDonateFirmwareText": {
-        "message": "Cleanflight"
-    },
     "initialSetupButtonCalibrateAccel": {
         "message": "Calibrate Accelerometer"
     },

tabs/default.html

@@ -11,11 +11,8 @@
             <div class="title" i18n="defaultDonateHead"></div>
             <p i18n="defaultDonateText">
             </p>
-            <div class="buttons">            
-	            <ul>
-	                <li><p i18n="defaultDonateFirmwareText"></p><a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=TSQKVT6UYKGL6" target="_blank" title="Donate for cleanflight firmware"><img src="./images/btn_donate_SM.gif" alt="Paypal" /></a></li>
-	                <li><p i18n="defaultDonateConfiguratorText"></p><a href="http://goo.gl/xQMKN" target="_blank" title="Donate for configurator"><img src="./images/btn_donate_SM.gif" alt="Paypal" /></a></li>
-	            </ul>
+            <div class="buttons">
+                <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=TSQKVT6UYKGL6" target="_blank" title="Donate"><img src="./images/btn_donate_SM.gif" alt="Paypal" /></a></li>
             </div>
         </div>
         <div class="sponsors">