D7968: WIP: Forward QComboBox signals instead of QComboBox lineedit signals

[Kai Uwe Broulik]

broulik added inline comments.

INLINE COMMENTS

> apol wrote in kurlrequester.cpp:132
> We can use qOverload now (we depend on Qt 5.7). It will end being much more readable.

`qOverload()` requires C++14 which I don't think we can use in Frameworks.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D7968

To: mwolff, apol
Cc: broulik, apol, #frameworks
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