[Bug] QSelect does not allow white space in filter

[rmandrei]

Operating System Darwin(17.2.0) - darwin/x64
NodeJs 8.9.1
NPM 5.5.1
quasar-cli 0.15.5
vue-cli 2.9.3

What did you get as the error?
When typing inside the QSelect's filter input, white spaces are not allowed and removed at 'keypress'. This goes for typing at the end of the string, or inside the string.

What were you expecting?
QSelect can have labels that contain white spaces, i expected to use whitespaces when filtering.

What steps did you take, to get the error?
Just a normal QSelect with filter enabled.

[rstoenescu]

Fix available in 0.15.6