[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/main/utils.ts

@@ -5,6 +5,11 @@
 import path from 'path';
 import fs from 'fs';
 
+import {exec as execOriginal} from 'child_process';
+
+import {promisify} from 'util';
+const exec = promisify(execOriginal);
+
 import {app, BrowserWindow} from 'electron';
 
 import {Args} from 'types/args';
@@ -136,3 +141,19 @@ export function shouldIncrementFilename(filepath: string, increment = 0): string
     }
     return filename;
 }
+
+export function resetScreensharePermissionsMacOS() {
+    if (process.platform !== 'darwin') {
+        return Promise.resolve();
+    }
+    return exec('tccutil reset ScreenCapture Mattermost.Desktop',
+        {timeout: 1000});
+}
+
+export function openScreensharePermissionsSettingsMacOS() {
+    if (process.platform !== 'darwin') {
+        return Promise.resolve();
+    }
+    return exec('open "x-apple.systempreferences:com.apple.preference.security?Privacy_ScreenCapture"',
+        {timeout: 1000});
+}