Automatic merge of T1.5.1-1284-gca636331f4 and 13 pull requests

- Pull request #839 at d00beb9: First phase of https://blueprints.launchpad.net/or/+spec/additional-cruise-control-parameters
- Pull request #891 at 9a1d6b2: Auto save
- Pull request #892 at 1f5ba4c: Signal Function OPP_SIG_ID_TRAINPATH
- Pull request #952 at 8347095: Investigation - Pulsing graphics
- Pull request #953 at a519452: Fix Lights Crash on Corrupt Shapes
- Pull request #954 at 62061b8: Multiple Track Profiles & Superelevation Improvements
- Pull request #972 at e90a2aa: On Map window color changed switch or signal is not changed
- Pull request #980 at 555619e: Downloading route content (Github, zip) second part 
- Pull request #981 at 10d297f: Multiple type trainset lightglows
- Pull request #982 at efcf19c: WEB based Switch Panel enhancement: Alerter
- Pull request #984 at 0f8122e: Player train switching for timetable mode
- Pull request #900 at c27f32d: DMI updates
- Pull request #876 at f92de76: docs: add source for documents previously on website to source Documentation folder

Author: openrails-bot

Source/Menu/ContentForm.cs

@@ -1380,7 +1380,11 @@ private void buttonManualInstallAdd_Click(object sender, EventArgs e)
         {
             In_buttonManualInstallAdd_Click = true;
 
-            int currentIndex = dataGridViewManualInstall.CurrentCell.RowIndex;
+            int currentIndex = -1;
+            if (dataGridViewManualInstall.CurrentCell != null)
+            {
+                currentIndex = dataGridViewManualInstall.CurrentCell.RowIndex;
+            }
             int addedIndex = dataGridViewManualInstall.Rows.Add();
             dataGridViewManualInstall.Rows[addedIndex].Selected = true;
             dataGridViewManualInstall.FirstDisplayedScrollingRowIndex = addedIndex;
@@ -1400,10 +1404,13 @@ private void buttonManualInstallAdd_Click(object sender, EventArgs e)
                 }
                 else
                 {
-                    // Cancel, set focus back to where is was and remove the empty row
-                    dataGridViewManualInstall.CurrentCell = dataGridViewManualInstall.Rows[currentIndex].Cells[0];
-                    dataGridViewManualInstall.Rows[currentIndex].Selected = true;
-                    dataGridViewManualInstall.FirstDisplayedScrollingRowIndex = currentIndex;
+                    if (currentIndex > -1)
+                    {
+                        // Cancel, set focus back to where is was and remove the empty row
+                        dataGridViewManualInstall.CurrentCell = dataGridViewManualInstall.Rows[currentIndex].Cells[0];
+                        dataGridViewManualInstall.Rows[currentIndex].Selected = true;
+                        dataGridViewManualInstall.FirstDisplayedScrollingRowIndex = currentIndex;
+                    }
 
                     dataGridViewManualInstall.Rows.Remove(dataGridViewManualInstall.Rows[addedIndex]);
                 }
@@ -1424,27 +1431,30 @@ private void buttonManualInstallDelete_Click(object sender, EventArgs e)
 
         private void setTextBoxesManualInstall()
         {
-            string route = dataGridViewManualInstall.CurrentRow.Cells[0].Value.ToString();
-            string path = dataGridViewManualInstall.CurrentRow.Cells[1].Value.ToString();
-
-            if (!AutoInstallRoutes.ContainsKey(route))
-            {
-                // route not automatically installed
-                textBoxManualInstallRoute.Text = route;
-                textBoxManualInstallPath.Text = path;
-                textBoxManualInstallRoute.Enabled = true;
-                textBoxManualInstallPath.Enabled = true;
-                buttonManualInstallBrowse.Enabled = true;
-                buttonManualInstallDelete.Enabled = true;
-            }
-            else
+            if (dataGridViewManualInstall.CurrentRow != null)
             {
-                textBoxManualInstallRoute.Text = "";
-                textBoxManualInstallPath.Text = "";
-                textBoxManualInstallRoute.Enabled = false;
-                textBoxManualInstallPath.Enabled = false;
-                buttonManualInstallBrowse.Enabled = false;
-                buttonManualInstallDelete.Enabled = false;
+                string route = dataGridViewManualInstall.CurrentRow.Cells[0].Value.ToString();
+                string path = dataGridViewManualInstall.CurrentRow.Cells[1].Value.ToString();
+
+                if (!AutoInstallRoutes.ContainsKey(route))
+                {
+                    // route not automatically installed
+                    textBoxManualInstallRoute.Text = route;
+                    textBoxManualInstallPath.Text = path;
+                    textBoxManualInstallRoute.Enabled = true;
+                    textBoxManualInstallPath.Enabled = true;
+                    buttonManualInstallBrowse.Enabled = true;
+                    buttonManualInstallDelete.Enabled = true;
+                }
+                else
+                {
+                    textBoxManualInstallRoute.Text = "";
+                    textBoxManualInstallPath.Text = "";
+                    textBoxManualInstallRoute.Enabled = false;
+                    textBoxManualInstallPath.Enabled = false;
+                    buttonManualInstallBrowse.Enabled = false;
+                    buttonManualInstallDelete.Enabled = false;
+                }
             }
         }