idle: add a grace period

toml-config/src/config.rs

@@ -67,7 +67,8 @@ pub enum Action {
         dev: ConfigDrmDevice,
     },
     ConfigureIdle {
-        idle: Duration,
+        idle: Option<Duration>,
+        grace_period: Option<Duration>,
     },
     ConfigureInput {
         input: Box<Input>,
@@ -348,6 +349,7 @@ pub struct Config {
     pub render_device: Option<DrmDeviceMatch>,
     pub inputs: Vec<Input>,
     pub idle: Option<Duration>,
+    pub grace_period: Option<Duration>,
     pub explicit_sync_enabled: Option<bool>,
     pub focus_follows_mouse: bool,
     pub window_management_key: Option<ModifiedKeySym>,