[Qt] very minor style cleanups

- rebuilt some ui file layout to remove unreal values from the files
- remove an unneeded attribute from an ui file
- add / remove some spaces in files

src/qt/forms/signverifymessagedialog.ui

@@ -19,9 +19,6 @@
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
     <widget class="QTabWidget" name="tabWidget">
-     <property name="currentIndex">
-      <number>0</number>
-     </property>
      <widget class="QWidget" name="tabSignMessage">
       <attribute name="title">
        <string>&amp;Sign Message</string>