Add option for live mode & timezone config, fix MSE check for iPad (#5079)

* Add config fields

* Clean up camera default values

* Set recordings timezone with config if available

* Adjust for timezone config

* Cleanup setting of the timezone

* Don't fail on MSE check iPad

* Fix MSE check for birdseye

* Add docs

* Fix test

frigate/config.py

@@ -60,7 +60,17 @@ class FrigateBaseModel(BaseModel):
         extra = Extra.forbid
 
 
+class LiveModeEnum(str, Enum):
+    jsmpeg = "jsmpeg"
+    mse = "mse"
+    webrtc = "webrtc"
+
+
 class UIConfig(FrigateBaseModel):
+    live_mode: LiveModeEnum = Field(
+        default=LiveModeEnum.mse, title="Default Live Mode."
+    )
+    timezone: Optional[str] = Field(title="Override UI timezone.")
     use_experimental: bool = Field(default=False, title="Experimental UI")