Allow rotaion in the attachment gallery

Closes #77

Tusker/Info.plist

@@ -69,6 +69,8 @@
 	<key>UISupportedInterfaceOrientations</key>
 	<array>
 		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
 	</array>
 	<key>UISupportedInterfaceOrientations~ipad</key>
 	<array>

Tusker/Screens/Gallery/GalleryViewController.swift

@@ -35,6 +35,14 @@ class GalleryViewController: UIPageViewController, UIPageViewControllerDataSourc
         return viewControllers?.first
     }
     
+    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
+        if UIDevice.current.userInterfaceIdiom == .phone {
+            return .allButUpsideDown
+        } else {
+            return .all
+        }
+    }
+    
     init(attachments: [Attachment], sourcesInfo: [LargeImageViewController.SourceInfo?], startIndex: Int) {
         self.attachments = attachments
         self.sourcesInfo = sourcesInfo

Tusker/Screens/Main/MainTabBarViewController.swift

@@ -10,6 +10,14 @@ import UIKit
 
 class MainTabBarViewController: UITabBarController, UITabBarControllerDelegate {
 
+    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
+        if UIDevice.current.userInterfaceIdiom == .phone {
+            return .portrait
+        } else {
+            return .all
+        }
+    }
+    
     override func viewDidLoad() {
         super.viewDidLoad()
 

Tusker/Screens/Onboarding/InstanceSelectorTableViewController.swift

@@ -29,6 +29,14 @@ class InstanceSelectorTableViewController: UITableViewController {
     var urlHandler: AnyCancellable?
     var currentQuery: String?
     
+    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
+        if UIDevice.current.userInterfaceIdiom == .phone {
+            return .portrait
+        } else {
+            return .all
+        }
+    }
+    
     init() {
         super.init(style: .grouped)