Scouting: Add click feedback for mobility button

It's hard to tell if clicking the mobility button worked
when scouting so this change hides the button after you click it because
you don't need to press it multiple times.

Signed-off-by: Filip Kujawa <filip.j.kujawa@gmail.com>
Change-Id: I053ed5157cdf966b73df400672f8f86160506fed
diff --git a/scouting/www/entry/entry.component.ts b/scouting/www/entry/entry.component.ts
index 290e2fb..50d0cd9 100644
--- a/scouting/www/entry/entry.component.ts
+++ b/scouting/www/entry/entry.component.ts
@@ -127,6 +127,7 @@
   progressMessage: string = '';
   errorMessage: string = '';
   autoPhase: boolean = true;
+  mobilityCompleted: boolean = false;
   lastObject: ObjectType = null;
 
   preScouting: boolean = false;
@@ -202,6 +203,10 @@
       action.timestamp = Date.now() * 1e6 - this.matchStartTimestamp;
     }
 
+    if (action.type == 'mobilityAction') {
+      this.mobilityCompleted = true;
+    }
+
     if (
       action.type == 'pickupObjectAction' ||
       action.type == 'placeObjectAction'