only show drag space on Win & Linux with thin titlebar (ref #219)

terminus-core/src/components/appRoot.component.pug

@@ -29,7 +29,7 @@ title-bar(
             )
                 i.fa([class]='"fa fa-" + button.icon')
                 
-        .drag-space
+        .drag-space(*ngIf='config.store.appearance.frame == "thin" && hostApp.platform != Platform.macOS')
             
         .btn-group
             button.btn.btn-secondary.btn-tab-bar(

terminus-core/src/components/tabHeader.component.ts

@@ -27,7 +27,7 @@ export class TabHeaderComponent {
             {
                 label: 'Close',
                 click: () => {
-                    this.zone.run(() => {
+                    zone.run(() => {
                         app.closeTab(this.tab, true)
                     })
                 }