Log window, Directories pane: Add "Ignore" to context menu

Now you can right click a file in Files-panel and click "Ignore" to add the file to .ignore.
But it's not possible to add a folder to ignore.
I suggest to add option "Add folder to ignore". 
Or do not block slashes in pattern input textbox.
The reason why it is prohibited is unclear.

Even better - to add option "Ignore folder" to a folder menu here: