bang: hide lines when they are useless

bang.py

@@ -53,10 +53,13 @@ def list_bangs(config):
         print(f"- {handle}: {name}")
 
 
-def run_rofi(config, input_text="", title="bang"):
+def run_rofi(config, input_text="", title="bang", no_lines=False):
     rofi_path = config.get("rofi_path", "rofi")
+    args = ["-dmenu", "-p", title]
+    if no_lines:
+        args += ["-l", "0"]
     completed_process = subprocess.run(
-        [rofi_path, "-dmenu", "-p", title],
+        [rofi_path] + args,
         text=True,
         capture_output=True,
         input=input_text,
@@ -111,7 +114,10 @@ def main():
             queries.append(" ".join(bang_args[1:]))
     # Else show a Rofi with the list of available bangs.
     else:
-        process_input = "\n".join(i["handle"] for i in config["bangs"]) + "\n"
+        process_input = "\n".join(
+            i["handle"]
+            for i in sorted(config["bangs"], key=lambda bang: bang["handle"])
+        ) + "\n"
         output = run_rofi(config, input_text=process_input)
         parts = output.split(maxsplit=1)
         if len(parts) < 1:
@@ -122,7 +128,7 @@ def main():
 
     # If no queries were obtained during options parsing, show Rofi now to get a single query.
     if not queries:
-        queries.append(run_rofi(config, title=handle))
+        queries.append(run_rofi(config, title=handle, no_lines=True))
 
     for query in queries:
         open_bang(config, handle, query)