variable-length data types in table designer default to length of 1

[Benjin]

Repro:

1. Create or edit table
2. create new column
3. select type varchar/nvarchar/varbinary

Expected:

• default length is something useful, like 20 or 50
• "type" selection displays length ("nvarchar(50)") when selected. It should be possible to have the selection in the dropdown display just "nvarchar", but override the displayed value to be "nvarchar(50)" when it's selected by playing with the combo box's value and selectedOptions

Reality:

• default length is a not-particularly-useful 1
• "type" dropdown doesn't diplay the length, which can make this easy to miss