Support closing windows

writeas/AppDelegate.swift

@@ -69,6 +69,10 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         }
     }
 
+    @IBAction func fileClose(_ sender: Any) {
+        NSApplication.shared().mainWindow!.close()
+    }
+
     @IBAction func toggleNightMode(_ sender: NSMenuItem) {
         let isOff = sender.state == NSOffState
 

writeas/Base.lproj/Main.storyboard

@@ -83,6 +83,12 @@
                                             </menu>
                                         </menuItem>
                                         <menuItem isSeparatorItem="YES" id="m54-Is-iLE"/>
+                                        <menuItem title="Close" keyEquivalent="w" id="Jqh-E2-bP0">
+                                            <connections>
+                                                <action selector="fileClose:" target="Voe-Tx-rLC" id="wwH-Vr-YXS"/>
+                                            </connections>
+                                        </menuItem>
+                                        <menuItem isSeparatorItem="YES" id="qlM-x5-Aiq"/>
                                         <menuItem title="Save" keyEquivalent="s" id="pxx-59-PXV">
                                             <connections>
                                                 <action selector="saveDocument:" target="Voe-Tx-rLC" id="6F3-Jk-bXC"/>