The testscases of the w_undo.bas test are noted "tUndoHistory1",
"tUndoHistory2"..."tUndoHistory43" which is not really helpful when looking at
testz results and (I guess) when modifying the testscripts.

Please give those testcases a meaningful names as listed below:

tUndoHistory1 -> tUndoOverwrite
tUndoHistory2 -> tUndoFindAndReplace 
tUndoHistory3 -> tUndoReplaceAll
tUndoHistory4 -> tUndoSort
tUndoHistory5 -> tUndoTableConvert'///Can be deleted. Duplicate of tUndoHistory30
tUndoHistory6 -> tUndoOverwriteLong  
tUndoHistory7 -> tUndoFindAndReplaceLong
tUndoHistory8 -> tUndoDeleteMultiSelection
tUndoHistory9 -> tUndoParagraph
tUndoHistory10 -> tUndoClipboard
tUndoHistory11 -> tUndoChanges
tUndoHistory12 -> tUndoLineBreak
tUndoHistory13 -> tUndoColumnBreak
tUndoHistory14 -> tUndoPageBreak
tUndoHistory15 -> tUndoFields
tUndoHistory16 -> tUndoSpecialCharacter
tUndoHistory17 -> tUndoStyles
tUndoHistory18 -> tUndoSection
tUndoHistory19 -> tUndoHyperlink
tUndoHistory20 -> tUndoFootnote
tUndoHistory21 -> tUndoCaption
tUndoHistory22 -> tUndoAutoText
tUndoHistory23 -> tUndoBookmark
tUndoHistory24 -> tUndoNote
tUndoHistory25 -> tUndoScript
tUndoHistory26 -> tUndoIndexes
tUndoHistory27 -> tUndoFrames
tUndoHistory28 -> tUndoTableGeneral
tUndoHistory29 -> tUndoTableOptionsMerge
tUndoHistory30 -> tUndoTableConvertSort
tUndoHistory31 -> tUndoTableSplitDelete
tUndoHistory32 -> tUndoHorizontalRuler
tUndoHistory33 -> tUndoGraphics
tUndoHistory34 -> tUndoOLEObject
tUndoHistory35 -> tUndoFloatingFrame
tUndoHistory36 -> tUndoInsertFile
tUndoHistory37 -> tUndoAsianPhoneticGuides
tUndoHistory38 -> tUndoAutocorrect
tUndoHistory39 -> tUndoDrawObject
tUndoHistory40 -> tUndoDrawObjectGroup
tUndoHistory41 -> tUndoSpellcheck
tUndoHistory42 -> tUndoFormControl
tUndoHistory43 -> tUndoHeaderFooter