Make dark theme have black(ish) background for OLED

www/assets/css/oled.css

@@ -0,0 +1,16 @@
+/*
+To change this license header, choose License Headers in Project Properties.
+To change this template file, choose Tools | Templates
+and open the template in the editor.
+*/
+/*
+    Created on : Aug 23, 2019, 7:24:01 PM
+    Author     : Skylar Ittner
+*/
+
+:root #app.theme-dark {
+    --f7-page-bg-color: #020202;
+    --f7-list-bg-color: #020202;
+    --f7-popover-bg-color: #020202;
+    --f7-sheet-bg-color: #020202;
+}

www/index.html

@@ -9,6 +9,7 @@
 <link rel="stylesheet" href="node_modules/leaflet.markercluster/dist/MarkerCluster.Default.css" />
 <link rel="stylesheet" href="node_modules/leaflet.locatecontrol/dist/L.Control.Locate.min.css" />
 <link rel="stylesheet" href="assets/css/backdrop.css" />
+<link rel="stylesheet" href="assets/css/oled.css" />
 
 <script src="cordova.js"></script>