Bug: TDNT data type is case sensitive for searching

When using the abbreviated name for searching it is necessary to use lower case to get the same results as the full name e.g. <tdnt 8.1>. TWOT, LN, GGK, HGK are not case sensitive for searching.

Software version: 4.0d.
Reported by Dave Hooton.
Forum link: https://logos.vanillacommunities.com/forums/t/19567.aspx?PageIndex=2
Status: fixed in 4.1 beta 1