When selecting a conversation, PageDown and PageUp are more useful to navigate through the mails in the conversation

[Félix Brezo]

Using PageDown and PageUp can be pretty helpful in several apps. I've noticed myself hopig these keys to navigate the right pane of the emails grouped in a conversation. Currently, when selecting a conversation and pressing PageDown and PageUp navigates in the middle pane (the one that lists the conversations) instead of navigating in the right pane.

Although this may be an expected behaviour, even when manually clicking in an email in the conversation, these keys navigate in the middle pane. Maybe a solution would only imply adding a special shortcut to scroll with the keys in the rigght pane (ctrl + PageDown?)