We copy the QString, so it makes sense to accept it by value and _move_
it into the collection instead. This causes the caller to move any
rvalue QString into the function, and then the QString is never actually
copied at all.
Catch the case the model is empty in ComboBoxModel::currentText() and
return an empty string instead of crashing. Fixes crash with settings
dialog if no sound devices are accessible via PortAudio.
Most files and most of the core classes and their methods have been
renamed to match new coding style conventions:
391 files changed, 25400 insertions(+), 25598 deletions(-)
Furthermore splitted some files where model and view classes were
declared or implemented together in the same file.
Should be tested thoroughly as I might have missed renaming some virtual
methods or SIGNAL/SLOT parameters.
(cherry picked from commit 8c9a9dd14c)
