Fix Autocomplete gargage on command

update version
add batch for build to not open terminal

build.bat

@@ -0,0 +1,3 @@
+cd %~dp0
+cmd.exe /c gulp package
+pause

www/index.html

@@ -6,7 +6,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <title>ESP3D WebUI</title>
     <script>var target_firmware="";</script>
-    <script>var web_ui_version="2.1b17";</script>
+    <script>var web_ui_version="2.1b18";</script>
     <script>var direct_sd=false;</script>
     <script>var fw_version="";</script>
     <script>var primary_sd= "/ext/";</script>

www/sub/commandpanel.html

@@ -10,7 +10,9 @@
         <div class="panel-flex-row">
              <div class="input-group">
                 <div class="input-group">
-                    <input class="form-control w14" type="text" onkeyup="CustomCommand_OnKeyUp(event)" id="custom_cmd_txt" autocomplete="off" translateph placeholder="Send Command..." />
+                    <form autocomplete="off" onsubmit="return false;">
+						<input autocomplete="off" class="form-control w14" type="text" onkeyup="CustomCommand_OnKeyUp(event)" value="" id="custom_cmd_txt" translateph placeholder="Send Command..." />
+                    </form>
                     <div class="input-group-btn">
                         <button class="btn btn-success" onclick="SendCustomCommand();" translate>Send</button>
                     </div>