Some low-effort visibility hygiene

locker/src/monitor.rs

@@ -15,13 +15,13 @@ struct BacklightControl {
 }
 
 pub struct Monitor<'a> {
-    pub conn: &'a xcb::Connection,
+    conn: &'a xcb::Connection,
     pub root: x::Window,
     pub black_gc: x::Gcontext,
-    pub output: randr::Output,
+    output: randr::Output,
     pub blanker_window: x::Window,
     pub unlock_window: x::Window,
-    pub blank_cursor: x::Cursor,
+    blank_cursor: x::Cursor,
     pub x: i16,
     pub y: i16,
     pub width: u16,