open a new tab using MENU_TAB_NEW

[frans.randolfi]

Goodmorning all,

i always used a few mapped keys to quickly make a new tab and another key to rename.

for some odd reason when using MENU_TAB_NEW it opens the session manager where i have to enter to execute the command.

crt version is 8.3.1
had to redo al keys / buttonbar and have the feeling i am not using the correct function for what i want.