Docx writer: Use Table rather than "Table Normal" for table style.

"Table Normal" is the default table style and can't be modified.

Closes #3275, further testing welcome.

MANUAL.txt

@@ -880,7 +880,7 @@ Options affecting specific writers
         Image Caption, Figure, Captioned Figure, TOC Heading;
         [character] Default Paragraph Font, Body Text Char,
         Verbatim Char, Footnote Reference, Hyperlink; [table]
-        Normal Table.
+        Table.
 
     ODT
 

data/docx/word/styles.xml

@@ -342,8 +342,9 @@
     <w:semiHidden />
     <w:unhideWhenUsed />
   </w:style>
-  <w:style w:type="table" w:default="1" w:styleId="TableNormal">
-    <w:name w:val="Normal Table" />
+  <w:style w:type="table" w:default="1" w:styleId="Table">
+    <w:name w:val="Table" />
+    <w:basedOn w:val="TableNormal" />
     <w:semiHidden />
     <w:unhideWhenUsed />
     <w:qFormat />

src/Text/Pandoc/Writers/Docx.hs

@@ -953,7 +953,7 @@ blockToOpenXML' opts (Table caption aligns widths headers rows) = do
     caption' ++
     [mknode "w:tbl" []
       ( mknode "w:tblPr" []
-        (   mknode "w:tblStyle" [("w:val","TableNormal")] () :
+        (   mknode "w:tblStyle" [("w:val","Table")] () :
             mknode "w:tblW" [("w:type", "pct"), ("w:w", show rowwidth)] () :
             mknode "w:tblLook" [("w:firstRow","1") | hasHeader ] () :
           [ mknode "w:tblCaption" [("w:val", captionStr)] ()