Fix reactivity issue on mute alerts btn (#7316)

Author: diegoimbert

frontend/src/routes/(root)/(logged)/flows/get/[...path]/+page.svelte

@@ -470,9 +470,7 @@
 			bind:errorHandlerMuted={
 				() => flow?.ws_error_handler_muted ?? false,
 				(v) => {
-					if (flow?.ws_error_handler_muted) {
-						flow.ws_error_handler_muted = v
-					}
+					if (flow !== undefined) flow.ws_error_handler_muted = v
 				}
 			}
 			scriptOrFlowPath={flow?.path ?? ''}

frontend/src/routes/(root)/(logged)/scripts/get/[...hash]/+page.svelte

@@ -571,9 +571,7 @@
 				bind:errorHandlerMuted={
 					() => script?.ws_error_handler_muted ?? false,
 					(v) => {
-						if (script?.ws_error_handler_muted) {
-							script.ws_error_handler_muted = v
-						}
+						if (script !== undefined) script.ws_error_handler_muted = v
 					}
 				}
 				errorHandlerKind="script"