Add offset to suggestion text hide calculation

[Garulf]

Adds a slight offset to the comparison of Rendered text and text box length.

Before:

After:

[jjw24]

can you send me a string to test, i cant replicate what you got in the screenshot.

[Garulf]

can you send me a string to test, i cant replicate what you got in the screenshot.

It's tricky because the text has to be just at the cut off after you tab complete it.

any chance we can not hard code 40 but get it dynamically?

Offset is adjustable in settings file. Not sure if it's really needed in GUI.

EDIT: Which I'm now realizing is not what you meant... I would need to some how grab the right-padding being set by the theme on the QueryTextbox

[jjw24]

Able to replicate with current release 1.9.0:
Auto complete for websearch enabled
search guys only
auto tab to guys only want one thing
then auto tab to guys only want one thing and it's disgusting tweet