Mouse navigation activates too easily

When editing C++ code, the mouse navigation activates when Ctrl is held while releasing the left mouse button over a link. This too often leads to unwanted link activation. Proposed changes:

• Require both press and release on the link (ie. respond only to "clicked")
• Abort when the cursor moves (ie. to select some text)

This is the exact same issue as this old one: https://bugreports.qt.io/browse/QTCREATORBUG-134

The original commit made back then is this one: https://code.qt.io/cgit/qt-creator/qt-creator.git/commit/?id=2c115e934fb5700e42f64491af92b3facfb2cbf0.

This happen very often when doing copy paste with  "double click" + "Ctrl+C/V".