FULL PRODUCT VERSION :
java 8

ADDITIONAL OS VERSION INFORMATION :
linux fedora 25 64bi, windows 7 64bit

A DESCRIPTION OF THE PROBLEM :
when set TableColumn width usin css em uniit like -fx-pref-width:4.0em; . i can't change the TableColumn width correctly at runtime

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
create javafx application
add TableView
add a lot of TableColumn's to the TableView may be 10 Columns
in css file add -fx-pref-width:4.0em; to the TableColumn
run the application


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
 try to change column width by the mouse it;s width will change to small value not that you expect

REPRODUCIBILITY :
This bug can be reproduced always.