Dialogs.rb: Replace 'render :update' with replace_right_cell method
in 'def dialog_res_remove'

As the fix for https://bugzilla.redhat.com/show_bug.cgi?id=1052223
Dialog_center_tb.yaml: Remove trailing whitespaces
Merge pull request #361 from jzigmund/bz1052223

Dialogs.rb: Replace 'render :update' with replace_right_cell method in 'def dialog_res_remove'