[Qt] misc small fixes for #3099 (new receive flow)

- changes some strings that were forgotton or made no sense in the conext
  they are used
- remove an orphan file from the qt project file
- revert a small change in signverifymessagedialog.ui
- guard #include "bitcoin-config.h" with #if defined(HAVE_CONFIG_H)
- remove windowTitle from addressbookpage.ui

contrib/bitcoin-qt.pro

@@ -4,7 +4,6 @@ FORMS += \
     ../src/qt/forms/sendcoinsentry.ui \
     ../src/qt/forms/sendcoinsdialog.ui \
     ../src/qt/forms/rpcconsole.ui \
-    ../src/qt/forms/qrcodedialog.ui \
     ../src/qt/forms/overviewpage.ui \
     ../src/qt/forms/optionsdialog.ui \
     ../src/qt/forms/intro.ui \