only show full screen button when the media is valid

Session/Media Viewing & Editing/MessageInfoView.swift

@@ -116,6 +116,7 @@ struct MessageInfoView: View {
                                     .padding(.horizontal, Values.largeSpacing)
                                 }
                                 
+                                if [ .downloaded, .uploaded ].contains(attachment.state) {
                                     Button {
                                         self.showMediaFullScreen(attachment: attachment)
                                     } label: {
@@ -131,6 +132,7 @@ struct MessageInfoView: View {
                                     .padding(.bottom, Values.smallSpacing)
                                     .padding(.trailing, 38)
                                 }
+                            }
                             .padding(.vertical, Values.verySmallSpacing)
                             
                             // Attachment Info