Add new Power Query functions and update settings for improved data handling

power-query/specific/fNormalizeColumnNames.m

@@ -0,0 +1,22 @@
+(         TBL_SOURCE    as table, 
+ optional S_RENAME_TAG  as nullable text,
+ optional B_DO_RENAME   as nullable logical) as table => 
+    let
+        RenamingNeeded = if B_DO_RENAME  = null then true else B_DO_RENAME,
+        RenameTag =      if S_RENAME_TAG = null then ""   else S_RENAME_TAG,
+        
+        InitialColumnNames = Table.ColumnNames(TBL_SOURCE),
+        RenameTableColumns = if RenamingNeeded then
+                                let
+                                    NewColumnNames = List.Transform(InitialColumnNames, each fReplaceFunction(_, true, S_RENAME_TAG)),
+                                    RenameColumns = Table.RenameColumns(TBL_SOURCE, 
+                                                                        List.Zip({InitialColumnNames, NewColumnNames}))
+                                in
+                                    RenameColumns
+                             else
+                                TBL_SOURCE,
+        
+        ColumnsToKeep = fGetNeededColumnNames(RenameTag),
+        KeepNeeded = Table.SelectColumns(RenameTableColumns, ColumnsToKeep, MissingField.Ignore)
+    in
+        KeepNeeded