Refactor, minor changes and remove depreciated functions

reactor.html

@@ -2,7 +2,7 @@
 
 <script type="text/javascript">
     RED.nodes.registerType("reactor", {
-        category: "WWTP",
+        category: "EVOLV",
         color: "#c4cce0",
         defaults: {
             name: { value: "" },
@@ -10,7 +10,6 @@
             volume: { value: 0., required: true },
             length: { value: 0.},
             resolution_L: { value: 0.},
-            alpha: {value: 0},
             kla: { value: null },
             
             S_O_init: { value: 0., required: true },
@@ -92,10 +91,6 @@
                     $(".PFR").show();
                 }
             });
-            $("#node-input-alpha").typedInput({
-                type:"num",
-                types:["num"]
-            })
             $("#node-input-timeStep").typedInput({
                 type:"num",
                 types:["num"]
@@ -149,13 +144,6 @@
         <label for="node-input-resolution_L"><i class="fa fa-tag"></i> Resolution</label>
         <input type="text" id="node-input-resolution_L" placeholder="#">
     </div>
-    <div class="PFR">
-        <p> Inlet boundary condition parameter &alpha; (&alpha; = 0: Danckwerts BC / &alpha; = 1: Dirichlet BC) </p>
-        <div class="form-row">
-            <label for="node-input-alpha"><i class="fa fa-tag"></i>Adjustable parameter BC</label>
-            <input type="text" id="node-input-alpha">
-        </div>
-    </div>
     <h3> Internal mass transfer calculation (optional) </h3>
     <div class="form-row">
         <label for="node-input-kla"><i class="fa fa-tag"></i> kLa [d-1]</label>
@@ -227,7 +215,6 @@
     <!-- Position fields will be injected here -->
     <div id="position-fields-placeholder"></div>
 
-
 </script>
 
 <script type="text/html" data-help-name="reactor">