Full ui structure refactoring. InheritedWidget as entity model

lib/entity_class/select_entity.class.dart

@@ -1,42 +0,0 @@
-part of '../main.dart';
-
-class _SelectEntityWidgetState extends _EntityWidgetState {
-  List<String> _listOptions = [];
-
-  @override
-  void setNewState(newValue) {
-    eventBus.fire(new ServiceCallEvent(widget.entity.domain, "select_option", widget.entity.entityId,
-        {"option": "$newValue"}));
-  }
-
-  @override
-  Widget _buildActionWidget(BuildContext context) {
-    Widget ctrl;
-    _listOptions.clear();
-    if (widget.entity.attributes["options"] != null) {
-      widget.entity.attributes["options"].forEach((value){
-        _listOptions.add(value.toString());
-      });
-    }
-    if (_listOptions.isNotEmpty) {
-      ctrl = DropdownButton<String>(
-        value: widget.entity.state,
-        items: this._listOptions.map((String value) {
-          return new DropdownMenuItem<String>(
-            value: value,
-            child: new Text(value),
-          );
-        }).toList(),
-        onChanged: (_) {
-          setNewState(_);
-        },
-      );
-    } else {
-      ctrl = Text('---');
-    }
-    return Expanded(
-      //width: Entity.INPUT_WIDTH,
-      child: ctrl,
-    );
-  }
-}