Clean up layout; fix colors and auto-populate

ltx_flutter/lib/pages/today_views/day_view.dart

@@ -528,6 +528,12 @@ class _HourFormFieldState extends State<HourFormField> {
 
   @override
   Widget build(BuildContext context) {
+        if (widget.category != null) {
+      catNum = widget.category!.number.toString();
+      fgColor = widget.category!.foregroundColor;
+      catName = widget.category!.name;
+    }
+
     return Row(
       children: [
         SizedBox(
@@ -557,7 +563,14 @@ class _HourFormFieldState extends State<HourFormField> {
                     "hourField-${widget.dayEntry.$id}-${widget.index.toString()}"),
                 textInputAction: TextInputAction.next,
                 onEditingComplete: () {
-                  String value = _controller.value.text;
+                  String value;
+                  String current = _controller.value.text;
+                  if(current == ""){
+                    value = getPreviousHourValue(widget);
+                  }
+                  else{
+                    value = current;
+                  }
                   database.updateHours(widget.dayEntry, widget.index, value);
                   setState(() {
                     widget.category = categories.lookUp(num.parse(value));
@@ -588,3 +601,10 @@ class _HourFormFieldState extends State<HourFormField> {
     );
   }
 }
+String getPreviousHourValue(widget) {
+  int prevIndex = widget.index - 1;
+  if(prevIndex < 0){ return "0";}
+  else{
+    return widget.dayEntry.data['hours'][prevIndex].toString();
+  }
+}