added separator between items in the network detail list

ZeroTier One/ShowNetworksViewController.xib

@@ -27,7 +27,8 @@
                                 <autoresizingMask key="autoresizingMask"/>
                                 <size key="intercellSpacing" width="3" height="2"/>
                                 <color key="backgroundColor" red="1" green="1" blue="1" alpha="0.59999999999999998" colorSpace="calibratedRGB"/>
-                                <color key="gridColor" red="1" green="1" blue="1" alpha="1" colorSpace="calibratedRGB"/>
+                                <tableViewGridLines key="gridStyleMask" horizontal="YES"/>
+                                <color key="gridColor" white="0.33333333333333331" alpha="1" colorSpace="calibratedWhite"/>
                                 <tableColumns>
                                     <tableColumn width="527" minWidth="40" maxWidth="1000" id="ztK-JB-A6Q">
                                         <tableHeaderCell key="headerCell" lineBreakMode="truncatingTail" borderStyle="border">