exec node: add windowsHide option to hide windows under Windows

packages/node_modules/@node-red/nodes/core/function/90-exec.html

@@ -40,6 +40,10 @@
         <input type="text" id="node-input-timer" style="width:65px;" data-i18n="[placeholder]exec.label.timeoutplace">
         <span data-i18n="exec.label.seconds"></span>
     </div>
+    <div class="form-row">
+        <label for="node-input-windowsHide" style="width: auto !important; padding-right:10px"><i class="fa fa-windows"></i> <span data-i18n="exec.label.windowshide"></span></label>
+        <input type="checkbox" id="node-input-windowsHide" style="display:inline-block; width:auto;">
+    </div>
     <div class="form-row">
         <label for="node-input-name"><i class="fa fa-tag"></i> <span data-i18n="common.label.name"></span></label>
         <input type="text" id="node-input-name" data-i18n="[placeholder]common.label.name">
@@ -56,6 +60,7 @@
             append: {value:""},
             useSpawn: {value:"false"},
             timer: {value:""},
+            windowsHide: {value:false},
             oldrc: {value:false},
             name: {value:""}
         },
@@ -92,6 +97,12 @@
             });
 
             $("#node-input-addpay-cb").trigger("change")
+            
+            if (this.windowsHide === "true" || this.windowsHide === true) {
+                $("#node-input-windowsHide").prop("checked",true);
+            } else {
+                $("#node-input-windowsHide").prop("checked",false);
+            }
         },
         oneditsave: function() {
             if (!$("#node-input-addpay-cb").prop("checked")) {

packages/node_modules/@node-red/nodes/core/function/90-exec.js

@@ -34,7 +34,8 @@ module.exports = function(RED) {
         this.timer = Number(n.timer || 0)*1000;
         this.activeProcesses = {};
         this.oldrc = (n.oldrc || false).toString();
-        this.execOpt = {encoding:'binary', maxBuffer:RED.settings.execMaxBufferSize||10000000};
+        this.execOpt = {encoding:'binary', maxBuffer:RED.settings.execMaxBufferSize||10000000, windowsHide: (n.windowsHide === true)};
+        this.spawnOpt = {windowsHide: (n.windowsHide === true) }
         var node = this;
 
         if (process.platform === 'linux' && fs.existsSync('/bin/bash')) { node.execOpt.shell = '/bin/bash'; }

packages/node_modules/@node-red/nodes/locales/en-US/function/90-exec.html

@@ -80,4 +80,5 @@
     <p>If the node has more than one process running then <code>msg.pid</code> must also be set with the value of the PID to be killed.</p>
     <p>If a value is provided in the <code>Timeout</code> field then, if the process has not completed when the specified number of seconds has elapsed, the process will be killed automatically</p>
     <p>Tip: if running a Python app you may need to use the <code>-u</code> parameter to stop the output being buffered.</p>
+    <p>The <code>Hide windows</code> option can be set to hide shell windows under Windows.</p>
 </script>

packages/node_modules/@node-red/nodes/locales/en-US/messages.json

@@ -198,7 +198,8 @@
             "seconds": "seconds",
             "stdout": "stdout",
             "stderr": "stderr",
-            "retcode": "return code"
+            "retcode": "return code",
+            "windowshide": "Hide windows"
         },
         "placeholder": {
             "extraparams": "extra input parameters"