Fix remove attachment menu item not being marked destructive

Closes #334

Tusker/Screens/Compose/ComposeAttachmentRow.swift

@@ -37,9 +37,9 @@ struct ComposeAttachmentRow: View {
                         }
                     }
                     
-                    Button(action: self.removeAttachment) {
+                    Button(role: .destructive, action: self.removeAttachment) {
                         Label("Delete", systemImage: "trash")
-                    }.foregroundStyle(.red)
+                    }
                 } previewIfAvailable: {
                     ComposeAttachmentImage(attachment: attachment, fullSize: true)
                 }

Tusker/Screens/Customize Timelines/PinnedTimelinesView.swift

@@ -45,6 +45,13 @@ struct PinnedTimelinesView: View {
                         .foregroundColor(Color(.lightGray))
                         .accessibilityHidden(true)
                 }
+                .contextMenu {
+                    Button(role: .destructive) {
+                        pinnedTimelines.removeAll(where: { $0.id == timeline.id })
+                    } label: {
+                        Label("Remove Pinned Timeline", systemImage: "trash")
+                    }
+                }
             }
             .onMove { indices, newOffset in
                 pinnedTimelines.move(fromOffsets: indices, toOffset: newOffset)