1678547 - [meta] remove <tabpanels> usage from Thunderbird

Status: NEW

(Thunderbird :: General, task, P3)

Description

[Magnus Melin [:mkmelin]]

See bug 1559192 - XUL deck layout frame, which is <deck> and <tabpanels> is on the cutting list.

There's very few <tabpanels> usages outside tests, in Firefox: https://searchfox.org/mozilla-central/search?q=%3Ctabpanels&path=

For mail: https://searchfox.org/comm-central/search?q=%3Ctabpanels&path=%5Email&case=false&regexp=false
For calendar: https://searchfox.org/comm-central/search?q=%3Ctabpanels&path=%5Ecalendar&case=false&regexp=false

Comment 1

[Magnus Melin [:mkmelin]]

https://developer.mozilla.org/en-US/docs/Archive/Mozilla/XUL/tabpanels:

A container to hold the set of pages in a tabbox. The tabpanels element should be placed in a tabbox although it does not have to be a direct child. The children of the tabpanels element become the panels of the tabbox. In most cases you would use a vbox, but they can be any element, although some people like to use tabpanel elements. By clicking the first tab, the first panel will be displayed. By clicking the second tab, the second panel will be displayed and so on. There should be the same number of panels as there are tabs. Panels should never be hidden; hiding the tab suffices to make the panel inaccessible.

https://developer.mozilla.org/en-US/docs/Archive/Mozilla/XUL/tabpanel:

A individual panel in a tabpanels element. This element is optional and you may just use any other container in place of it.