Multiple instances check

Former-commit-id: 0bfd0937

docs/todo.txt

@@ -21,4 +21,3 @@ Cancel/disconnect improvement
 Connection "dirty" flag handle
 Formatting profiles to connection association
 Structs in record mode
-Multiple instances check

plugins/org.jkiss.dbeaver.core.application/src/org/jkiss/dbeaver/core/application/DBeaverApplication.java

@@ -69,9 +69,9 @@ public class DBeaverApplication implements IApplication
                         shell = new Shell(display, SWT.ON_TOP);
                     }
                     MessageBox messageBox = new MessageBox(shell, SWT.ICON_WARNING | SWT.IGNORE | SWT.RETRY | SWT.ABORT);
-                    messageBox.setText("Can't lock workspace");
-                    messageBox.setMessage("Can't lock workspace [" + defaultHomeURL + "]. " +
-                        "It seems that you have another DBeaver instance running. " +
+                    messageBox.setText("DBeaver - Can't lock workspace");
+                    messageBox.setMessage("Can't lock workspace at " + defaultHomePath + ".\n" +
+                        "It seems that you have another DBeaver instance running.\n" +
                         "You may ignore it and work without lock but it is recommended to shutdown previous instance otherwise you may corrupt workspace data.");
                     switch (messageBox.open()) {
                         case SWT.ABORT: