[pgAdmin4] - Runtime compilation error

Hi Dave,

We are just compiling the new runtime source code in Linux and we are
getting the below error during the compilation.

TabWindow.cpp: In constructor ‘TabWindow::TabWindow(QWidget*)’:
TabWindow.cpp:68:15: error: ‘class QTabBar’ has no member named
‘setAutoHide’
tabBar()->setAutoHide(true);
^

After debugging, we came to know that we have added "setAutoHide"
functionality when QTabBar contains the less than 2 tabs.
As per the Qt documentation, "setAutoHide" is supported from Qt 5.4
onwards.
In Linux we are using Qt 5.2, in that "setAutoHide" is not supported so we
are getting above error.

Qt 5.2 Documentation for the reference.
http://qt.apidoc.info/5.2.0/qtwidgets/qtabbar-members.html

Qt 5.5 Documentation for the reference.
http://doc.qt.io/qt-5/qtabbar-members.html

Find attached patch file with the fix. We have tested in Linux and Mac.
Please review it and let us know for any comments.

Thanks,
Neel Patel