fixed another tabbing issue where it was possible to reach non existing tab indices,

published version 1.0.0.14

MultiTerm.Wpf/Properties/PublishProfiles/ClickOnceProfile.pubxml

@@ -4,7 +4,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
 -->
 <Project>
   <PropertyGroup>
-    <ApplicationRevision>14</ApplicationRevision>
+    <ApplicationRevision>15</ApplicationRevision>
     <ApplicationVersion>1.0.0.*</ApplicationVersion>
     <BootstrapperEnabled>True</BootstrapperEnabled>
     <Configuration>Release</Configuration>
@@ -36,7 +36,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
     <WebPageFileName>index.html</WebPageFileName>
     <ManifestCertificateThumbprint>BC1274DD90DC13A3CE1634A82AC005CDB6852B06</ManifestCertificateThumbprint>
     <ManifestKeyFile>MultiTerm.Wpf_TemporaryKey.pfx</ManifestKeyFile>
-    <History>True|2023-07-02T09:49:58.8132399Z;True|2023-06-06T21:40:32.7933627+02:00;True|2023-05-31T13:53:55.3496532+02:00;True|2023-05-31T12:15:48.2252015+02:00;</History>
+    <History>True|2023-07-02T13:23:10.2794474Z;True|2023-07-02T11:49:58.8132399+02:00;True|2023-06-06T21:40:32.7933627+02:00;True|2023-05-31T13:53:55.3496532+02:00;True|2023-05-31T12:15:48.2252015+02:00;</History>
   </PropertyGroup>
   <ItemGroup>
     <BootstrapperPackage Include="Microsoft.NetCore.DesktopRuntime.6.0.x64">

MultiTerm.Wpf/View/ShellView.xaml.cs

@@ -28,6 +28,7 @@ public partial class ShellView : UserControl
         if ( e.Key == System.Windows.Input.Key.Tab && 
             e.KeyboardDevice.Modifiers == System.Windows.Input.ModifierKeys.Control )
         {
+            // increment to larger index than existing is handled by tab control
             this.terminalTabControl.SelectedIndex++;
             e.Handled = true;
         }
@@ -35,7 +36,11 @@ public partial class ShellView : UserControl
         else if ( e.Key == System.Windows.Input.Key.Tab && 
                   e.KeyboardDevice.Modifiers == (System.Windows.Input.ModifierKeys.Control | System.Windows.Input.ModifierKeys.Shift) )
         {
-            this.terminalTabControl.SelectedIndex--;
+            // only move backwards if the resulting index is >= 0
+            if(this.terminalTabControl.SelectedIndex > 0)
+            {
+                this.terminalTabControl.SelectedIndex--;
+            }
             e.Handled = true;
         }
     }