feat: Enable upside down orientation for iPad

The "upside down" orientation for iPad devices was disabled in
05814add86d765b83c91baa3120ba65569803906b55b159fbd091a95876e40a70d.
However, as an iPad user, not having all orientations is quite
uncomfortable and sometimes annoying. Most apps support all
orientations on iPad nowadays. This commit brings back the upside down
orientation in all places where it was disabled.

Session/Media Viewing & Editing/DocumentTitleViewController.swift

@@ -45,6 +45,10 @@ public class DocumentTileViewController: UIViewController, UITableViewDelegate,
     // MARK: - UI
     
     override public var supportedInterfaceOrientations: UIInterfaceOrientationMask {
+        if UIDevice.current.isIPad {
+            return .all
+        }
+
         return .allButUpsideDown
     }
     

Session/Media Viewing & Editing/MediaGalleryNavigationController.swift

@@ -44,6 +44,10 @@ class MediaGalleryNavigationController: UINavigationController {
     // MARK: - Orientation
 
     public override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
+        if UIDevice.current.isIPad {
+            return .all
+        }
+
         return .allButUpsideDown
     }
     

Session/Media Viewing & Editing/MediaTileViewController.swift

@@ -53,6 +53,10 @@ public class MediaTileViewController: UIViewController, UICollectionViewDataSour
     // MARK: - UI
     
     override public var supportedInterfaceOrientations: UIInterfaceOrientationMask {
+        if UIDevice.current.isIPad {
+            return .all
+        }
+
         return .allButUpsideDown
     }
     

Session/Meta/AppDelegate.swift

@@ -192,7 +192,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterD
 
     func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
         if UIDevice.current.isIPad {
-            return .allButUpsideDown
+            return .all
         }
         
         return .portrait

Session/Meta/Session-Info.plist

@@ -147,6 +147,7 @@
 		<string>UIInterfaceOrientationLandscapeLeft</string>
 		<string>UIInterfaceOrientationLandscapeRight</string>
 		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
 	</array>
 	<key>UIViewControllerBasedStatusBarAppearance</key>
 	<true/>