Replace show_all with present (#875)

Author: danirabbit

src/Application.vala

@@ -120,7 +120,7 @@ namespace Maya {
             calmodel.load_all_sources ();
 
             init_gui ();
-            window.show_all ();
+            window.present ();
 
             if (add_event) {
                 Idle.add (() => {
@@ -136,14 +136,14 @@ namespace Maya {
                 calmodel.load_all_sources ();
 
                 init_gui ();
-                window.show_all ();
+                window.present ();
             } else {
                 get_windows ().data.present (); // present window if app is already running
             }
 
             var dialog = new Maya.View.ImportDialog (files);
             dialog.transient_for = window;
-            dialog.show_all ();
+            dialog.present ();
         }
 
         /**

src/MainWindow.vala

@@ -55,6 +55,7 @@ public class Maya.MainWindow : Hdy.ApplicationWindow {
         hpaned.pack2 (sidebar, false, false);
 
         child = hpaned;
+        show_all ();
 
         var header_group = new Hdy.HeaderGroup ();
         header_group.add_header_bar (calview.header_bar);

src/Widgets/SourcePopover.vala

@@ -101,7 +101,7 @@ public class Calendar.Widgets.SourcePopover : Gtk.Popover {
 
                 if (files != null) {
                     var dialog = new Maya.View.ImportDialog (files);
-                    dialog.show_all ();
+                    dialog.present ();
                 }
             });