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Bug
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    Resolution: Duplicate
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P3: Somewhat important
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    None
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    Qt Creator 2.4.0
 
The line edit automatically hides on moving the mouse outside of the state "widget".
While nice in theory there are two annoyances:
a) The "-" removal button also hides 
and even more annoying:
b) The line edit itself hides the line edit, that is moving the mouse out of the line edit and back hides the line edit.