fix(mask): Masks containing maskable chars bleed
fix(mask): Masks containing maskable chars bleed

Masks containing maskable chars, such as letters and numbers, had a
chance to "bleed" into the unmasked value as reported in issue #494.
I've fixed this from happening with the caveat that potentially
maskable chars need at least a space somewhere between it and the
non-mask chars to work accurately.

Dragging a selection and deleting/replacing it can still cause
bleeding, but I can't think of any way to fix that. At least it's
enough of an edge-case to be acceptable, in my opinion.

NickTomlin/ui-mask,DexStr/ui-uploader,mengshadow/angularjs,angular-ui/ui-mask,akhilshastri/ui-utils,isaacplmann/ui-mask,angular-ui/ui-indeterminate,mengshadow/angularjs,r0b-/ui-validate,lukepfeiffer10/ui-mask,KingMario/ui-uploader,zhaokunfay/ui-validate,xuwupeng2000/ui-event,graingert/ui-utils,xml/ui-mask,RafaelTaranto/ui-mask,HawkHouseIntegration/ui-mask,zhaokunfay/ui-mask,graingert/ui-jq,marbletravis/ui-mask,behzad88/ui-utils,saike/ui-mask,r0b-/ui-validate,zhaokunfay/ui-mask,zhaokunfay/ui-indeterminate,gdi2290/ui-utils,graingert/ui-keypress,angular-ui/ui-event,isaacplmann/ui-mask,Queatz/ui-validate,lu4/ui-mask,zhaokunfay/ui-uploader,zhaokunfay/ui-uploader,sndp-vrma/ui-utils,Queatz/ui-validate,angular-ui/ui-uploader,zhaokunfay/ui-event,modulexcite/ui-utils,graingert/ui-keypress,pedroso/ui-mask,angular-ui/ui-event,aniellepizzo/ui-scrollpoint,KingMario/ui-uploader,aniellepizzo/ui-scrollpoint,lu4/ui-mask,zhaokunfay/ui-scrollpoint,lith-light-g/ui-scrollpoint,NickTomlin/ui-mask,angular-ui/ui-scrollpoint,Mojility/ui-uploader,RafaelTaranto/ui-mask,zhaokunfay/ui-scrollpoint,DexStr/ui-uploader,angular-ui/ui-validate,angular-ui/ui-utils,saike/ui-mask,lith-light-g/ui-scrollpoint,xuwupeng2000/ui-event,zhaokunfay/ui-event,angular-ui/ui-indeterminate,graingert/ui-jq,angular-ui/ui-scrollpoint,zhaokunfay/ui-validate,HawkHouseIntegration/ui-mask,xml/ui-mask,graingert/ui-utils,pedroso/ui-mask,Mojility/ui-uploader,lukepfeiffer10/ui-mask,marbletravis/ui-mask,sndp-vrma/ui-utils,zhaokunfay/ui-indeterminate