Feature/cef speedup (#806)

* Improve cmake errors
  * Calling doMessageLoopWork more often to increase gui performance
  * Introduce frequent callbacks
  * Restructure browser update callbacks
  * Cleanup cef speedup
  * Add flag to toggle updating browser between renderable calls
  * CEF should not be used in single process mode
  * Update CEF version
  * Postbuild step for finding framework from web helper
  * Load libcef dynamically to fix issue with CEF update
  * Only include dynamic library loader on mac
  * Improve keyboard mapping support on MacOS
  * Add arrow keys
  * Rename manifest
  * Fix bug with missing blinking cursor in text fields
  * Bump minimum cmake version
  * CEF fixes: Runtime and correct helper path
  * Be true to actual sandbox compatibility specified by CEF
  * Cleanup

src/engine/globalscallbacks.cpp

@@ -96,4 +96,10 @@ std::vector<std::function<bool(double, double)>>& gMouseScrollWheel() {
     return g;
 }
 
+} // namespace openspace::global::detail
+
+namespace openspace::global::callback {
+
+void(*webBrowserPerformanceHotfix)() = nullptr;
+
 } // namespace openspace::global::callback

src/scene/scene.cpp

@@ -25,6 +25,7 @@
 #include <openspace/scene/scene.h>
 
 #include <openspace/engine/globals.h>
+#include <openspace/engine/globalscallbacks.h>
 #include <openspace/engine/windowdelegate.h>
 #include <openspace/query/query.h>
 #include <openspace/rendering/renderengine.h>
@@ -33,7 +34,6 @@
 #include <openspace/scene/sceneinitializer.h>
 #include <openspace/scripting/lualibrary.h>
 #include <openspace/util/camera.h>
-
 #include <ghoul/opengl/programobject.h>
 #include <ghoul/logging/logmanager.h>
 
@@ -313,6 +313,9 @@ void Scene::render(const RenderData& data, RendererTasks& tasks) {
         catch (const ghoul::RuntimeError& e) {
             LERRORC(e.component, e.what());
         }
+        if (global::callback::webBrowserPerformanceHotfix) {
+            (*global::callback::webBrowserPerformanceHotfix)();
+        }
     }
 }