Bug #534210: Add individual check item types.

Patch by Thomas Troesch: The proposed patch does:

1.  Changes the chk file key to Blocking_Chars as described in 607522 ( this
had been dropped by mistake ).

2.  Add several fields to the Custom tab in the print check dialog.

  Locations for:
  a.  split memos fields.
  b.  split accounts ( e.g.  Expenses:Auto )
  c.  split amounts ( e.g.  GBP 21.40 )

  The splits do not include the last split in the transaction.
  The keys in the chk format file are:
  SPLITS_AMOUNT
  SPLITS_MEMO
  SPLITS_ACCOUNTS

3.  Memo was added to the custom tab.  This is the memo from the split that
matches the account from the register.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@18636 57a11ea4-9604-0410-9ed3-97b8803252fd

checks/quicken.chk

@@ -18,7 +18,7 @@ Type_2 = AMOUNT_WORDS
 Coords_2 = 90.0;132.0
 
 Type_3 = AMOUNT_NUMBER
-Blocking_3 = true
+Blocking_Chars_3 = true
 Coords_3 = 500.0;102.0
 
 Type_4 = DATE

checks/quicken_wallet.chk

@@ -18,7 +18,7 @@ Type_2 = AMOUNT_WORDS
 Coords_2 = 195.0;79.0
 
 Type_3 = AMOUNT_NUMBER
-Blocking_3 = true
+Blocking_Chars_3 = true
 Coords_3 = 518.0;67.0
 
 Type_4 = DATE

checks/voucher.chk

@@ -4,7 +4,7 @@ Title = Voucher Check 3-Part US-Letter
 Font = sans 10
 Rotation = 0.0
 # override character blocking from global preferences
-Blocking = false
+Blocking_Chars = false
 Translation = 0.0;0.0
 Show_Grid = false
 Show_Boxes = false
@@ -17,11 +17,11 @@ Type_2 = DATE
 Coords_2 = 480.0;67.0
 
 Type_3 = AMOUNT_WORDS
-Blocking_3 = true
+Blocking_Chars_3 = true
 Coords_3 = 70.0;132.0;380.0;12.0
 
 Type_4 = AMOUNT_NUMBER
-Blocking_4 = true
+Blocking_Chars_4 = true
 Coords_4 = 510.0;107.0
 
 Type_5 = ADDRESS