Added Agent Availability screen

ac_web/lib/Api/Dtos/EAgentStatus.dart

@@ -2,22 +2,22 @@
 ///
 /// See the note in `EAgentType.dart` about ordering and [unknown].
 enum EAgentStatus {
-  offline,
-  idle,
+  available,
   working,
+  offline,
   error,
   unknown;
 
-  bool get isOnline => this == EAgentStatus.idle || this == EAgentStatus.working;
+  bool get isOnline => this == EAgentStatus.available || this == EAgentStatus.working;
 
   String get displayName {
     switch (this) {
-      case EAgentStatus.offline:
-        return 'Offline';
-      case EAgentStatus.idle:
-        return 'Idle';
+      case EAgentStatus.available:
+        return 'Available';
       case EAgentStatus.working:
         return 'Working';
+      case EAgentStatus.offline:
+        return 'Offline';
       case EAgentStatus.error:
         return 'Error';
       case EAgentStatus.unknown: