Search should show tasks which begin by the current query

[Izidor Matušov]

In Joao's branch ( lp:~gtg-contributors/gtg/gsoc2011-joaoascenso ) when you start typing a name of a task, all tasks which begin with the current text are shown for quick opening in the entry completion.

However, it doesn't work in the current trunk (rev 1027) because GTG use liblarch. Joao's code cache the list of all titles at startup and then use only that list. It should update that list dynamically using liblarch's callbacks.

[Izidor Matušov (izidor)]

I've decided to remove this feature. After selecting the full name of the task, it is just added to quickadd toolbar and not opened the task. It might confuse a user.