windows installer fixes

compilation/installer_client.nsi

@@ -1,5 +1,6 @@
 !include "MUI2.nsh"
 !include "LogicLib.nsh"
+!include "nsDialogs.nsh"
 
 Name "LOGAR Client"
 OutFile "../dist/LOGAR-Client-Setup.exe"
@@ -87,7 +88,7 @@ Function ConfigPageCreate
     ${NSD_OnClick} $CfgBrowseBtn OnBrowseCfg
 
     nsDialogs::Show
-Function
+FunctionEnd
 
 Function OnBrowseCfg
     nsDialogs::SelectFileDialog open "" "LOGAR Client Profiles (*.json)|*.json|All Files (*.*)|*.*"
@@ -96,11 +97,11 @@ Function OnBrowseCfg
         StrCpy $CFGFILE $0
         ${NSD_SetText} $CfgFileInput $CFGFILE
     ${EndIf}
-Function
+FunctionEnd
 
 Function ConfigPageLeave
     ${NSD_GetText} $CfgFileInput $CFGFILE
-Function
+FunctionEnd
 
 Section "Install"
     SetShellVarContext all