UI: View Log menu entry in Help -> Log Files menu

Since the file being logged to changes with each run, opening a log
file is a tad more involved than desirable when it's necessary to view
the log each time OBS is run. This new menu entry shortcuts opening the
file from the file system manually.

obs/window-basic-main.cpp

@@ -2111,6 +2111,22 @@ void OBSBasic::on_actionUploadLastLog_triggered()
 	UploadLog(App()->GetLastLog());
 }
 
+void OBSBasic::on_actionViewCurrentLog_triggered()
+{
+	char logDir[512];
+	if (os_get_config_path(logDir, sizeof(logDir), "obs-studio/logs") <= 0)
+		return;
+
+	const char* log = App()->GetCurrentLog();
+
+	string path = (char*)logDir;
+	path += "/";
+	path += log;
+
+	QUrl url = QUrl::fromLocalFile(QT_UTF8(path.c_str()));
+	QDesktopServices::openUrl(url);
+}
+
 void OBSBasic::on_actionCheckForUpdates_triggered()
 {
 	CheckForUpdates();