quick fix 2d config hor/ver/panel issues + battery usermod

- Add battery usermod
- set segexp default true
- quick fix 2d config hor/ver/panel issues

wled00/data/index.js

@@ -25,7 +25,7 @@ var ws, cpick, ranges;
 var cfg = {
 	theme:{base:"dark", bg:{url:""}, alpha:{bg:0.6,tab:0.8}, color:{bg:""}},
 	comp :{colors:{picker: true, rgb: false, quick: true, hex: false},
-          labels:true, pcmbot:false, pid:true, seglen:false, segpwr:false, segexp:false, css:true, hdays:false}
+          labels:true, pcmbot:false, pid:true, seglen:false, segpwr:false, segexp:true, css:true, hdays:false} //WLEDMM segexp true as default
 };
 var hol = [
 	[0,11,24,4,"https://aircoookie.github.io/xmas.png"], // christmas

wled00/data/settings_2D.htm

@@ -44,7 +44,7 @@
 		loadJS(url, false);	// If we set async false, file is loaded and executed, then next statement is processed
 	}
 
-	function UI(panels=1)
+	function UI(panels=-1) //WLEDM quick fix
 	{
 		gId("mpdiv").style.display = "block";
 
@@ -54,9 +54,11 @@
 			return;
 		}
 
-		let i = gId("panels").children.length;
-		if (i<panels) for (let j=i; j<panels; j++) addPanel(j);
-		if (i>panels) for (let j=i; j>panels; j--) remPanel();
+		if (panels != -1) { //WLEDM quick fix
+			let i = gId("panels").children.length;
+			if (i<panels) for (let j=i; j<panels; j++) addPanel(j);
+			if (i>panels) for (let j=i; j>panels; j--) remPanel();
+		}
 	}
 
 	function addPanels() {