KProxyDialog: Port KLineEdit to QLineEdit
Where the extra functionalities of KLineEdit isn't needed. This allows it not to link against KCompletion.
See KF6 task: https://phabricator.kde.org/T14305
Where the extra functionalities of KLineEdit isn't needed. This allows it not to link against KCompletion.
See KF6 task: https://phabricator.kde.org/T14305