Linux/FreeBSD/macOS: Column widths correct initially and on update (#1552)

Column width was updated before SlotListCtrl had the slots added,
which caused the column width to be incorrect before the first time
OnTimer ran to update it. Changing the order ensures the column width
is correct on program launch. Also ensure that we do not autosize
column to fit empty content.

Author: Jertzukka

src/Main/Forms/MainFrame.cpp

@@ -1687,7 +1687,6 @@ namespace VeraCrypt
 		}
 
 		VolumeInfoList protectionTriggeredVolumes;
-		SlotListCtrl->SetColumnWidth(0, wxLIST_AUTOSIZE);
 
 		// Update list
 		long prevItemIndex = -1;
@@ -1773,8 +1772,10 @@ namespace VeraCrypt
 			}
 		}
 
-		if (listChanged)
+		if (listChanged) {
+			SlotListCtrl->SetColumnWidth(0, wxLIST_AUTOSIZE);
 			OnListChanged();
+		}
 
 		foreach (shared_ptr <VolumeInfo> volume, protectionTriggeredVolumes)
 			OnHiddenVolumeProtectionTriggered (volume);

src/Main/GraphicUserInterface.cpp

@@ -2072,8 +2072,12 @@ namespace VeraCrypt
 			{
 				item.SetText (field);
 				listCtrl->SetItem (item);
-				if (item.GetColumn() == 3 || item.GetColumn() == 4)
+				if ((item.GetColumn() == 3 || item.GetColumn() == 4) && !item.GetText().IsEmpty())
 					listCtrl->SetColumnWidth(item.GetColumn(), wxLIST_AUTOSIZE);
+					// SlotListCtrl headers do not automatically move with column widths changing on macOS
+#ifdef TC_MACOSX
+					listCtrl->Update();
+#endif
 				changed = true;
 			}
 		}