sending tx proving added

src/templates/tx.html

@@ -93,7 +93,7 @@
                         command in  <i>monero-wallet-cli</i> command line tool</h5>
                     <form action="/prove" method="get" style="width:100%; margin-top:15px" class="style-1">
                        <input type="hidden" name="txhash" size="90" value="{{tx_hash}}"><br/>
-                       <input type="text" name="txprvkey" size="90" placeholder="Tx private key" style="margin-top:5px"><br/>
+                       <input type="text" name="txprvkey" size="90" placeholder="Tx private key"><br/>
                        <input type="text" name="xmraddress" size="90"placeholder="Recipient's Monero Address" style="margin-top:5px"><br/>
                        <input type="submit" value="Prove" style="margin-top:5px">
                     </form>