[App] next attempt to fix CI build error

- revert previous commit and re-add application as header

src/App/AutoTransaction.cpp

@@ -30,18 +30,13 @@
 #include "Transactions.h"
 
 
-FC_LOG_LEVEL_INIT("App",true,true)
+FC_LOG_LEVEL_INIT("App", true, true)
 
 using namespace App;
 
 static int _TransactionLock;
 static int _TransactionClosed;
 
-void* App::AutoTransaction::operator new(size_t size)
-{
-    return nullptr;
-}
-
 AutoTransaction::AutoTransaction(const char *name, bool tmpName) {
     auto &app = GetApplication();
     if(name && app._activeTransactionGuard>=0) {
@@ -245,8 +240,3 @@ bool TransactionLocker::isLocked() {
     return _TransactionLock > 0;
 }
 
-void* App::TransactionLocker::operator new(size_t size)
-{
-    return nullptr;
-}
-

src/Gui/ViewProviderPythonFeature.h

@@ -23,6 +23,7 @@
 #ifndef GUI_VIEWPROVIDERPYTHONFEATURE_H
 #define GUI_VIEWPROVIDERPYTHONFEATURE_H
 
+#include <App/Application.h>
 #include <App/AutoTransaction.h>
 #include <App/PropertyPythonObject.h>
 #include <App/FeaturePython.h>