Select all (ctrl+a), Cut (ctrl+x, Copy (ctrl+c), Paste (ctrl+v) do not work in Symbian in Qt editors

It's not possible to use keyboard shortcuts in Symbian devices with physical keyboard to do text editing operations: select all (ctrl+A), cut, copy and paste (ctrl+x/c/v).

This bug prevents user for using keyboard accelerators in devices like E7 and E6 in both Qt C++ and Qt Quick (+ Qt Quick Components) using applications.

There's more general bug report about keyboard accelerators/shortcuts assigned to QActions not working in Symbian in QTBUG-5730. During the study of that bug we found it's more complex to close that bug so we decided to focus on more urgent use case reported in this bug report so that we can release the basic functionality in Qt 4.7.4.

This bug report is concentrated only to get the basic editor keyboard shortcuts to work in Qt apps in Symbian. It will bring Select All, and Clipboard access keyboard shortcuts to Qt editors (e.g. QLineEdit/QTextEdit, QML TextInput/TextEdit, Qt Quick Components TextField/TextArea ...).