colorpicker: implemented color management

Also moves some items to ColorManager from Project for better accessibility and
re-uses some widgets in ExportDialog for improved code.

app/render/colormanager.cpp

@@ -98,6 +98,16 @@ QStringList ColorManager::ListAvailableInputColorspaces()
   return ListAvailableInputColorspaces(config_);
 }
 
+const QString &ColorManager::GetDefaultInputColorSpace() const
+{
+  return default_input_color_space_;
+}
+
+void ColorManager::SetDefaultInputColorSpace(const QString &s)
+{
+  default_input_color_space_ = s;
+}
+
 QStringList ColorManager::ListAvailableInputColorspaces(OCIO::ConstConfigRcPtr config)
 {
   QStringList spaces;

app/render/colormanager.h

@@ -36,6 +36,10 @@ public:
 
   QStringList ListAvailableInputColorspaces();
 
+  const QString& GetDefaultInputColorSpace() const;
+
+  void SetDefaultInputColorSpace(const QString& s);
+
   static QStringList ListAvailableInputColorspaces(OCIO::ConstConfigRcPtr config);
 
   enum OCIOMethod {
@@ -63,6 +67,9 @@ private:
 
   template<typename T>
   static void AssociateAlphaInternal(AlphaAction action, T* data, int pix_count);
+
+  QString default_input_color_space_;
+
 };
 
 #endif // COLORSERVICE_H