GH-2291 Fix build with Qt 5.11+

application/pages/global/ExternalToolsPage.cpp

@@ -19,6 +19,7 @@
 #include <QMessageBox>
 #include <QFileDialog>
 #include <QStandardPaths>
+#include <QTabBar>
 
 #include "settings/SettingsObject.h"
 #include "tools/BaseProfiler.h"

application/pages/global/JavaPage.cpp

@@ -20,6 +20,7 @@
 #include <QFileDialog>
 #include <QMessageBox>
 #include <QDir>
+#include <QTabBar>
 
 #include "dialogs/VersionSelectDialog.h"
 

application/pages/global/MinecraftPage.cpp

@@ -18,6 +18,7 @@
 
 #include <QMessageBox>
 #include <QDir>
+#include <QTabBar>
 
 #include "settings/SettingsObject.h"
 #include "MultiMC.h"

application/pages/global/PasteEEPage.cpp

@@ -19,6 +19,7 @@
 #include <QMessageBox>
 #include <QFileDialog>
 #include <QStandardPaths>
+#include <QTabBar>
 
 #include "settings/SettingsObject.h"
 #include "tools/BaseProfiler.h"

application/pages/global/ProxyPage.cpp

@@ -16,6 +16,8 @@
 #include "ProxyPage.h"
 #include "ui_ProxyPage.h"
 
+#include <QTabBar>
+
 #include "settings/SettingsObject.h"
 #include "MultiMC.h"
 

application/pages/instance/NotesPage.cpp

@@ -1,5 +1,6 @@
 #include "NotesPage.h"
 #include "ui_NotesPage.h"
+#include <QTabBar>
 
 NotesPage::NotesPage(BaseInstance *inst, QWidget *parent)
 	: QWidget(parent), ui(new Ui::NotesPage), m_inst(inst)

application/pages/modplatform/ImportPage.cpp

@@ -7,6 +7,7 @@
 #include "dialogs/ProgressDialog.h"
 #include "dialogs/NewInstanceDialog.h"
 #include <QFileDialog>
+#include <QValidator>
 #include <InstanceImportTask.h>
 
 class UrlValidator : public QValidator

application/pages/modplatform/VanillaPage.cpp

@@ -12,6 +12,7 @@
 #include <Filter.h>
 #include <Env.h>
 #include <InstanceCreationTask.h>
+#include <QTabBar>
 
 VanillaPage::VanillaPage(NewInstanceDialog *dialog, QWidget *parent)
 	: QWidget(parent), dialog(dialog), ui(new Ui::VanillaPage)