config: rename display to device

Because we toggle some ioctl settings based on this field, change the
name to better capture that we're selecting which device we want to load
settings for, not just the display module to load. This creates room for
future per-device settings without needing more config file fields.

daemon/src/config.rs

@@ -11,7 +11,7 @@ pub struct Config {
     pub qmdl_store_path: String,
     pub port: u16,
     pub debug_mode: bool,
-    pub display: Display,
+    pub device: Device,
     pub ui_level: u8,
     pub colorblind_mode: bool,
     pub key_input_mode: u8,
@@ -20,7 +20,7 @@ pub struct Config {
 
 #[derive(PartialEq, Debug, Clone, Deserialize, Serialize)]
 #[serde(rename_all = "lowercase")]
-pub enum Display {
+pub enum Device {
     Orbic,
     Tplink,
     Tmobile,
@@ -33,7 +33,7 @@ impl Default for Config {
             qmdl_store_path: "/data/rayhunter/qmdl".to_string(),
             port: 8080,
             debug_mode: false,
-            display: Display::Orbic,
+            device: Device::Orbic,
             ui_level: 1,
             colorblind_mode: false,
             key_input_mode: 0,