iOS: fixed #960 (returning on iPad reloads story)

A bit tricksy to track down, but videos keep playing and the scroll
position is preserved (on rotation while in the app, too).

clients/ios/Classes/StoryDetailViewController.m

@@ -2176,6 +2176,11 @@ shouldStartLoadWithRequest:(NSURLRequest *)request
 }
 
 - (void)changeWebViewWidth {
+    // Don't do this in the background, to avoid scrolling to the top unnecessarily
+    if ([UIApplication sharedApplication].applicationState == UIApplicationStateBackground) {
+        return;
+    }
+    
 //    [webView setNeedsLayout];
 //    [webView layoutIfNeeded];
     

clients/ios/Classes/StoryPageControl.m

@@ -368,7 +368,9 @@
 //        NSLog(@"---> Story page control did re-orient: %@ / %@", NSStringFromCGSize(self.view.bounds.size), NSStringFromCGSize(size));
         [self.view setNeedsLayout];
         [self.view layoutIfNeeded];
-        [self refreshPages];
+        
+        // This causes the story to reload on rotation (or when going to the background), but doesn't seem necessary?
+//        [self refreshPages];
     }];
 }
 

clients/ios/NewsBlur.xcodeproj/project.pbxproj

@@ -2431,7 +2431,7 @@
 		29B97313FDCFA39411CA2CEA /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0800;
+				LastUpgradeCheck = 0810;
 				ORGANIZATIONNAME = NewsBlur;
 				TargetAttributes = {
 					1D6058900D05DD3D006BFB54 = {