[chronojump] Fixed weird glitch on weirder macs when importing before load session

[Xavier de Blas <xaviblas src gnome org>]

commit de3ea4c55191af0d71d5881b872ab9fab7965ee2
Author: Xavier de Blas <xaviblas gmail com>
Date:   Wed Jul 1 18:13:58 2020 +0200

    Fixed weird glitch on weirder macs when importing before load session

 src/gui/app1/session/loadAndImport.cs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
---
diff --git a/src/gui/app1/session/loadAndImport.cs b/src/gui/app1/session/loadAndImport.cs
index 3f605d79..3cec372c 100644
--- a/src/gui/app1/session/loadAndImport.cs
+++ b/src/gui/app1/session/loadAndImport.cs
@@ -68,6 +68,20 @@ public partial class ChronoJumpWindow
 
        private void app1s_initializeGui()
        {
+               /*
+                * need these two lines for macOS because there are strange glitches if we do not put them 
here
+                * eg. if we start Chronojump and try to import without having done this first:
+                * app1s_notebook.CurrentPage = app1s_PAGE_SELECT_SESSION;
+                * then import buttons do not work.
+                * And if we do not do:
+                * app1s_notebook.CurrentPage = app1s_PAGE_IMPORT_START;
+                * before load session, buttons are displaced.
+                * All gets fixed resizing a bit the windows, but using Visible=true or .Show() does not 
solve the problem.
+                * So we need these (or destroy all the mac computers on the planet).
+                */
+               app1s_notebook.CurrentPage = app1s_PAGE_SELECT_SESSION;
+               app1s_notebook.CurrentPage = app1s_PAGE_IMPORT_START;
+
                if (app1s_type == app1s_windowType.LOAD_SESSION) {
                        app1s_file_path_import.Visible = false;
                        app1s_notebook_load_button_animation.Visible = true;