SL-15943 Snapshot 360 floater should refresh on hotkey

Ctrl+shift+alt+S should refresh the snapshot if floater is already open

indra/newview/llfloater360capture.cpp

@@ -113,6 +113,11 @@ BOOL LLFloater360Capture::postBuild()
     // by default each time vs restoring the last value
     mQualityRadioGroup->setSelectedIndex(0);
 
+    return true;
+}
+
+void LLFloater360Capture::onOpen(const LLSD& key)
+{
     // Construct a URL pointing to the first page to load. Although
     // we do not use this page for anything (after some significant
     // design changes), we retain the code to load the start page
@@ -153,8 +158,6 @@ BOOL LLFloater360Capture::postBuild()
     // We do an initial capture when the floater is opened, albeit at a 'preview'
     // quality level (really low resolution, but really fast)
     onCapture360ImagesBtn();
-
-    return true;
 }
 
 // called when the user choose a quality level using

indra/newview/llfloater360capture.h

@@ -47,6 +47,7 @@ class LLFloater360Capture:
 
         ~LLFloater360Capture();
         BOOL postBuild() override;
+        void onOpen(const LLSD& key) override;
         void handleMediaEvent(LLPluginClassMedia* self, EMediaEvent event) override;
 
         void changeInterestListMode(bool send_everything);