Related: fdo#60265 fix lunatic way to detect special filter name

The use of SBMAXEXTENSIONLENGTH appears to be an insane way
to detect full filter names and map them back to short suffixes
but we are passing suffixes separated by | and if that string
hits the SBMAXEXTENSIONLENGTH it gets blanked.

So, lets try only doing the conversion to suffix if the filter
name starts with a common substr handled by SetExtension

Change-Id: I42914d3e042133a2c5e28c9704b5fded7ca938dc

wizards/source/importwizard/DialogModul.xba

@@ -74,8 +74,6 @@ Public XMLTemplateList()
 ' Applications(X,8) = "File:///..." 	(TargetUrl of the templates)
 ' Applications(X,9) = 0				    (Key to the original Index of the Applications)
 
-Public Const SBMAXEXTENSIONLENGTH = 15
-
 
 Sub FillStep_Welcome()
 Dim i as Integer

wizards/source/importwizard/FilesModul.xba

@@ -187,7 +187,7 @@ Dim LocXMLTemplateContent as String
 	iKey = Applications(ApplIndex, SBAPPLKEY)
 	CurListString = PathCollection(CollectIndex, 2)
 	LocExtension = sFilterName(iKey +DistIndex, 0)
-	If Len(LocExtension) > SBMAXEXTENSIONLENGTH Then 			' 7 == Length of two extensions like 'sda|sdd
+	If Instr(LocExtension, "vnd.sun.xml.") = 1 Then
 		LocExtension = SetExtension(LocExtension)
 		LocContentString = sFilterName(iKey +DistIndex, 0)
 		LocContentString = ReplaceString(LocContentString, "|", ";")