Workaround for `UIAElement.isEnabled` sometimes returning false positives.

doublecheck_isEnabled.diff

diff --git a/Sources/Classes/UIAutomation/User Interface Elements/SLElement.m b/Sources/Classes/UIAutomation/User Interface Elements/SLElement.m
index 375cba2..2cac09a 100644
--- a/Sources/Classes/UIAutomation/User Interface Elements/SLElement.m	
+++ b/Sources/Classes/UIAutomation/User Interface Elements/SLElement.m	
@@ -362,6 +362,22 @@ UIAccessibilityTraits SLUIAccessibilityTraitAny = 0;
     return isVisible;
 }
 
+- (BOOL)isEnabled {
+    __block BOOL isEnabled = [super isEnabled];
+    
+    // sometimes UIAutomation says that a button is enabled when it's not, so we double check if possible
+    // (with no timeout--`isEnabled` should evaluate the current state of the element)
+    if (isEnabled) {
+        [self examineMatchingObject:^(NSObject *object) {
+            if ([object respondsToSelector:@selector(isEnabled)]) {
+                isEnabled = [(id)object isEnabled];
+            }
+        } timeout:0.0];
+    }
+    
+    return isEnabled;
+}
+
 #pragma mark -
 
 - (void)tapAtActivationPoint {