Add creating graph using Edge List.

i/css/create_graph_by_pair.css

@@ -0,0 +1,47 @@
+
+    .form-inline
+    {
+        .checkbox
+        {
+            margin-right: 12px;
+        }
+    }
+
+    #PairFieldPage
+    {
+		overflow: scroll;
+		width: 100%;
+		height: 300px;
+		overflow-wrap: normal;
+	}
+
+#AdjacencyMatrixFieldInput
+{
+    overflow: scroll;
+    max-width: 100%;
+    max-height: 300px;
+    overflow-x: scroll;
+    white-space:nowrap;
+}
+
+  #BadFormatMessage
+  {
+      padding: 8px;
+      display: none;
+  }
+
+::-webkit-scrollbar {
+    -webkit-appearance: none;
+    width: 7px;
+    height: 7px;
+}
+
+::-webkit-scrollbar-thumb {
+    border-radius: 4px;
+    background-color: rgba(0,0,0,.5);
+    -webkit-box-shadow: 0 0 1px rgba(255,255,255,.5);
+}
+
+#CreateByPair {
+    margin-bottom: 8px;
+}