Ignore "BackgroundYieldTime" setting if file picker window is open (Improves responsiveness of said window)

indra/newview/llappviewer.cpp

@@ -1332,7 +1332,7 @@ bool LLAppViewer::mainLoop()
 				// yield cooperatively when not running as foreground window
 				if (   gNoRender
 					   || (gViewerWindow && !gViewerWindow->getWindow()->getVisible())
-						|| !gFocusMgr.getAppHasFocus())
+						|| (!gFocusMgr.getAppHasFocus() && !AIFilePicker::activePicker) )
 				{
 					// Sleep if we're not rendering, or the window is minimized.
 					S32 milliseconds_to_sleep = llclamp(gSavedSettings.getS32("BackgroundYieldTime"), 0, 1000);

indra/newview/statemachine/aifilepicker.cpp

@@ -47,6 +47,8 @@
 #include "llwindowsdl.h"
 #endif
 
+AIFilePicker* AIFilePicker::activePicker = NULL;
+
 char const* AIFilePicker::state_str_impl(state_type run_state) const
 {
 	switch(run_state)
@@ -341,6 +343,7 @@ void AIFilePicker::open(std::string const& filename, ESaveFilter filter, std::st
 
 void AIFilePicker::initialize_impl(void)
 {
+	activePicker = this;
 	mCanceled = false;
 	if (mFilter.empty())
 	{
@@ -452,6 +455,10 @@ void AIFilePicker::multiplex_impl(state_type run_state)
 
 void AIFilePicker::finish_impl(void)
 {
+	if (activePicker == this)
+	{
+		activePicker = NULL;
+	}
 	if (mPluginManager)
 	{
 		mPluginManager->destroyPlugin();

indra/newview/statemachine/aifilepicker.h

@@ -203,6 +203,7 @@ private:
 
 public:
 	enum open_type { save, load, load_multiple };
+	static AIFilePicker* activePicker;
 
 private:
 	LLPointer<LLViewerPluginManager> mPluginManager;				//!< Pointer to the plugin manager.