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/data/locale/en-US.ini

@@ -207,6 +207,7 @@ Basic.MainMenu.Help.Logs="&Log Files"
 Basic.MainMenu.Help.Logs.ShowLogs="&Show Log Files"
 Basic.MainMenu.Help.Logs.UploadCurrentLog="Upload &Current Log File"
 Basic.MainMenu.Help.Logs.UploadLastLog="Upload &Last Log File"
+Basic.MainMenu.Help.Logs.ViewCurrentLog="&View Current Log"
 Basic.MainMenu.Help.CheckForUpdates="Check For Updates"
 
 # basic mode settings dialog

obs/forms/OBSBasic.ui

@@ -581,6 +581,7 @@
      <addaction name="actionShowLogs"/>
      <addaction name="actionUploadCurrentLog"/>
      <addaction name="actionUploadLastLog"/>
+     <addaction name="actionViewCurrentLog"/>
     </widget>
     <addaction name="menuLogFiles"/>
     <addaction name="actionCheckForUpdates"/>
@@ -806,6 +807,11 @@
     <string>Basic.MainMenu.Help.Logs.UploadCurrentLog</string>
    </property>
   </action>
+  <action name="actionViewCurrentLog">
+   <property name="text">
+    <string>Basic.MainMenu.Help.Logs.ViewCurrentLog</string>
+   </property>
+  </action>
   <action name="actionUndo">
    <property name="enabled">
     <bool>false</bool>

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();

obs/window-basic-main.hpp

@@ -238,6 +238,7 @@ private slots:
 	void on_actionShowLogs_triggered();
 	void on_actionUploadCurrentLog_triggered();
 	void on_actionUploadLastLog_triggered();
+	void on_actionViewCurrentLog_triggered();
 	void on_actionCheckForUpdates_triggered();
 
 	void on_actionEditTransform_triggered();