Fix #11698, broken file chooser in editor

changelog

@@ -1,5 +1,6 @@
 CVS HEAD:
  * user interface improvements:
+   * fix editor file chooser when starting directory has many files (#11698)
    * made it so network dialogs show progress of data transfers again
    * starting position in editor now starts at player 1 (#10625)
    * fixed female units not appearing in help (broken since 0.9.0)

src/widgets/file_chooser.cpp

@@ -47,8 +47,11 @@ file_chooser::file_chooser(display &disp, std::string start_file)
 		current_dir_ = path_delim_;
 		chosen_file_ = current_dir_;
 	}
-	// Set sizes to some default values.
-	set_measurements(400, 500);
+	// FIXME: quick hack
+	// on a high-res screen the initial max_items_onscreen is based
+	// on .66 of y dimension, eg. 17 menu items, exceeding the
+	// starting box which can only take 13 or so: force it to be smaller
+	set_measurements(400, 384);
 	update_file_lists();
 	display_chosen_file();
 }