fix(app): keep hydrated state across gateway session resumes (#1862)

fluxer_app/src/features/channel/state/ChannelPins.ts

@@ -104,7 +104,7 @@ class ChannelPins {
 		};
 	}
 
-	handleConnectionOpen(): void {
+	handleGatewayReady(): void {
 		this.channelPins = {};
 		this.channelState = {};
 	}

fluxer_app/src/features/channel/state/Channels.ts

@@ -235,7 +235,7 @@ class Channels {
 	}
 
 	@action
-	handleConnectionOpen({channels}: {channels: ReadonlyArray<WireChannel>}): void {
+	handleGatewayReady({channels}: {channels: ReadonlyArray<WireChannel>}): void {
 		this.channelsById.clear();
 		this.channelsByGuildId.clear();
 		this.privateChannelList = EMPTY_CHANNELS;