Console Menu bar is not aware of Log tab

[tferr]

Currently, the Edit -> Clear command works only if the active tab is 'Console'. We would need to make it aware of the Log tab.
NB: even though orphan menus feel quite awkward, deleting the Edit menu is unwise, as per #79 (comment)

It is considered bad UI design (at least historically by Apple HCI documents) to have functionality that is only accessible in context menus. See e.g. web browsers, which have Cut/Copy/Paste et al. in both context menu and an Edit menu.