[Bug] Gain entry (detected from TDT)

[CodyCBakerPhD]

This was recently fixed on the NeuroConv side (gain was explicitly exposed)

However, a bizarre issue on the front end side (not altogether blocking, will probably raise as separate issue)

If I type 0 - . - any other number, such as a common gain of 0.195, the form entry bugs out and the . moves the insertion line to the left and does not add the . character

To insert the correct value, I need to start with the . instead

Originally posted by @CodyCBakerPhD in #246 (comment)

[CodyCBakerPhD]

Note: using Windows. Unsure how platform specific this is