Don't quickswitch without input

src/main.rs

@@ -111,7 +111,9 @@ impl RoftlLoop {
                     trace!{"Narrow result {:?}", results}
 
                     // quick switch if only one result
-                    if results.len() == 1 {
+                    // but make sure that input buffer is filled, otherwise will immediately close
+                    // if there is only one window
+                    if results.len() == 1 && !self.input_buffer.is_empty() {
                         self.roftl.exec_default(0);
                         *flow = ControlFlow::Exit;
                         return;