1478772 - Changing active tab doesn't change widget focus

Status: UNCONFIRMED

(Thunderbird :: Toolbars and Tabs, defect)

Description

[Macho Philipovich]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0
Build ID: 20180704192850

Steps to reproduce:

* Have multiple tabs open (e.g. with Lightning, open the tasks or calendar tab, although I don't believe this bug is in any way specific to Lightning's tabs in particular)
* In your main mail tab, click e.g. a mail account in the left sidebar
* Change tabs (either Ctrl+PgDn or click the other tab), e.g. to the tasks tab
* Hit the down arrow key


Actual results:

* The main mail tab (i.e. no longer the selected tab) has its title visibly change as focus changes from the account to the first subitem in the left sidebar (e.g. inbox).
* Nothing happens in the currently selected tab


Expected results:

* Assuming the currently selected tab is tasks, the selection should move down from whatever the currently selected task is. But you have to actually click the active tab with your mouse first for this to work, in order for it to get the focus.
* Nothing, of course, should happen in the no-longer-active main mail tab