Feature/globals (#690)

* Move global objects out of OpenSpaceEngine
 * General cleanup of main.cpp
 * Add default_joystick asset to all scenes
 * No longer suppress mouse interaction on slave nodes
 * Window delegate uses function pointers rather than subclassing
 * Fix for false overwriting of ImGUI configuration file
 * Change default color and tilt angle of fisheye rendering
 * Restructured performance manager
 * Simplify screenshot handling

src/scripting/scriptengine.cpp

@@ -25,7 +25,7 @@
 #include <openspace/scripting/scriptengine.h>
 
 #include <openspace/engine/configuration.h>
-#include <openspace/engine/openspaceengine.h>
+#include <openspace/engine/globals.h>
 #include <openspace/network/parallelpeer.h>
 #include <openspace/util/syncbuffer.h>
 #include <ghoul/filesystem/filesystem.h>
@@ -582,8 +582,8 @@ bool ScriptEngine::writeLog(const std::string& script) {
     // Check that logging is enabled and initialize if necessary
     if (!_logFileExists) {
         // If a ScriptLogFile was specified, generate it now
-        if (!OsEng.configuration().scriptLog.empty()) {
-            _logFilename = absPath(OsEng.configuration().scriptLog);
+        if (!global::configuration.scriptLog.empty()) {
+            _logFilename = absPath(global::configuration.scriptLog);
             _logFileExists = true;
 
             LDEBUG(fmt::format(
@@ -633,8 +633,8 @@ void ScriptEngine::preSync(bool isMaster) {
         _receivedScripts.push_back(_currentSyncedScript);
         _queuedScripts.pop_back();
 
-        if (OsEng.parallelPeer().isHost() && remoteScripting) {
-            OsEng.parallelPeer().sendScript(_currentSyncedScript);
+        if (global::parallelPeer.isHost() && remoteScripting) {
+            global::parallelPeer.sendScript(_currentSyncedScript);
         }
     }
     _mutex.unlock();