various improvements to import process and project management

app/ui/icons/icons.cpp

@@ -58,6 +58,7 @@ QIcon olive::icon::ZoomOut;
 QIcon olive::icon::Record;
 QIcon olive::icon::Add;
 QIcon olive::icon::Error;
+QIcon olive::icon::Folder;
 
 void olive::icon::LoadAll()
 {
@@ -92,6 +93,7 @@ void olive::icon::LoadAll()
   Record = Create("record");
   Add = Create("add-button");
   Error = Create("error");
+  Folder = Create("folder");
 }
 
 QIcon olive::icon::Create(const QString &name)

app/ui/icons/icons.h

@@ -61,6 +61,7 @@ extern QIcon ZoomOut;
 extern QIcon Record;
 extern QIcon Add;
 extern QIcon Error;
+extern QIcon Folder;
 
 /**
  * @brief Create an icon object loaded from file