[MM-46980] Improve screensharing permissions flow (#2556)

* Little improvements and simplification

* Improve MacOS screen permissions handling flow

* Add missing error event

* Propagate calls client errors (#2557)

src/types/calls.ts

@@ -29,6 +29,12 @@ export type CallsJoinedCallMessage = {
     callID: string;
 }
 
+export type CallsErrorMessage = {
+    err: string;
+    callID?: string;
+    errMsg?: string;
+}
+
 export type CallsLinkClickMessage = {
     link: string | URL;
 }