Automatic merge of T1.5.1-1785-ga4b51ce87 and 13 pull requests

- Pull request #570 at 362e4e7: glTF 2.0 support with PBR lighting
- Pull request #1062 at bbc0013: Train Forces popup Window.
- Pull request #1064 at cb510d6: Add Train Info tab to Help window (F1)
- Pull request #1082 at 5845a1a: Allow variable water level in glass gauge
- Pull request #892 at 1f5ba4c: Signal Function OPP_SIG_ID_TRAINPATH
- Pull request #1057 at 84592f7: Switchable brake system
- Pull request #1070 at f818e40: Fix a NullReferenceException in TCS scripts
- Pull request #1074 at e9a66c1: Gradient - commit 2024-16-12
- Pull request #1076 at 3bbd537: Allow depart early
- Pull request #1078 at 9ab642e: Default PowerSupply script for steam locomotives
- Pull request #1079 at 592e054: Adds Polish transations
- Pull request #1083 at fc8adf7: Menu contents route name clash
- Pull request #1081 at 689494b: Brake cuts power unification

Author: openrails-bot

Source/Menu/ContentForm.cs

@@ -141,6 +141,8 @@ public ContentForm(UserSettings settings, string baseDocumentationUrl)
 
             ManualInstallBrouwseDir = determineBrowseDir();
             buttonCancel.Enabled = false;
+
+            setTextBoxesManualInstall();
         }
 
         void changeManualInstallRoute(string Route)
@@ -1563,6 +1565,7 @@ private void setTextBoxesManualInstall()
                 }
                 else
                 {
+                    // route automatically installed
                     textBoxManualInstallRoute.Text = "";
                     textBoxManualInstallPath.Text = "";
                     textBoxManualInstallRoute.Enabled = false;
@@ -1571,26 +1574,47 @@ private void setTextBoxesManualInstall()
                     buttonManualInstallDelete.Enabled = false;
                 }
             }
+            else
+            {
+                // empty form, like after installing OR
+                textBoxManualInstallRoute.Text = "";
+                textBoxManualInstallPath.Text = "";
+                textBoxManualInstallRoute.Enabled = false;
+                textBoxManualInstallPath.Enabled = false;
+                buttonManualInstallBrowse.Enabled = false;
+                buttonManualInstallDelete.Enabled = false;
+            }
         }
 
         string determineUniqueRoute(string Route)
         {
             string route = Route;
             long seqNr = 0;
-            bool found = false;
+            bool foundUniqueRoute = false;
 
-            while (!found)
+            if (AutoInstallRoutes.ContainsKey(route))
             {
-                found = true;
+                // route already exists in the AutoInstall routes
+                seqNr = 1;
+                route = Route + " (" + seqNr + ")";
+            }
+
+            while (!foundUniqueRoute)
+            {
+                bool found = false;
                 for (int i = 0; i < dataGridViewManualInstall.Rows.Count; i++)
                 {
-                    if (((!dataGridViewManualInstall.Rows[i].Selected)) && (dataGridViewManualInstall.Rows[i].Cells[0].Value.ToString() == route) ||
-                            (AutoInstallRoutes.ContainsKey(route))) {
+                    if ((!dataGridViewManualInstall.Rows[i].Selected) && (dataGridViewManualInstall.Rows[i].Cells[0].Value.ToString() == route))
+                    {
                         seqNr++;
                         route = Route + " (" + seqNr + ")";
-                        found = false;
+                        found = true;
                     }
                 }
+                if (!found)
+                {
+                    foundUniqueRoute = true;
+                }
             }
 
             return route;