Windows setup: Fix silent installation

Now the setup can be called with /S for a silent installation

Fixes #703

distribute/windows/installer.nsi

@@ -40,8 +40,6 @@
   !define MUI_PAGE_HEADER_SUBTEXT "Please wait while ${AppName} is being installed."
 ; Uncomment the next line if you want optional components to be selectable
 ;  !insertmacro MUI_PAGE_COMPONENTS
-  !define MUI_PAGE_CUSTOMFUNCTION_PRE myPreInstfiles
-  !define MUI_PAGE_CUSTOMFUNCTION_LEAVE RestoreSections
   !insertmacro MUI_PAGE_DIRECTORY
   !insertmacro MUI_PAGE_INSTFILES
   !insertmacro MUI_PAGE_FINISH
@@ -170,29 +168,8 @@ SectionEnd
 ;Installer Functions
 
 Function .onInit
-
-  ;Extract InstallOptions INI Files
-  Call SetupSections
-
-FunctionEnd
-
-Function myPreInstfiles
-
-  Call RestoreSections
-  SetAutoClose true
-
-FunctionEnd
-
-Function RestoreSections
-  !insertmacro SelectSection ${SecAppFiles}
-  !insertmacro SelectSection ${SecCreateShortcut}
-
-FunctionEnd
-
-Function SetupSections
-  !insertmacro UnselectSection ${SecAppFiles}
-  !insertmacro UnselectSection ${SecCreateShortcut}
 FunctionEnd
+
 
 ;--------------------------------
 ;Uninstaller Section