Add two actions to shrink and enlarge the text in the log pane. Add a theme
overide to set expander size to 1 (see bug #615985) and also turn focus lines
off. Remove extra ypadding on cells.
These also appear in the context menu of the timeline. The more generic wording
makes more sense for the timeline, since you do not pinpoint any specific line
in this case.
Seems like pygobject can all of the sudden not handle a NULL model on a
property. Using the getter works around this. Also using the setter now for
consistency.
