Display timeshift status and infobar on first skip back

[prl]

Currently, the first skip that starts timeshift and skips back does not show the timeshift status and infobar. They are only displayed on the second press of a skip button.

The skip status and infobar should be displayed on the first skip.

[Peter Urbanec]

Fix bug #394: Display timeshift status and infobar on first skip back

Use self.doSeekRelative() instead of self.getSeek().seekTo() to skip back when activating time shift with LEFT/DOWN skips. This brings the code into agreement with the actions for skips once rime shift has been activated.

→ <<cset 8ca2e4467fc1>>