[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

src/qt/forms/addressbookpage.ui

@@ -10,9 +10,6 @@
     <height>380</height>
    </rect>
   </property>
-  <property name="windowTitle">
-   <string/>
-  </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
     <widget class="QLabel" name="labelExplanation">