Code review comment for lp://qastaging/~edgar-b-dsouza/acire/gui_tweaks

Three revisions for some minor GUI tweaks, absence of which was annoying me as I played around with Acire, which I'm a fan of and have some ideas for... if I can figure out the code :)

(BTW: this is my first time with bzr, LP, collaborative dev; please correct me if it is wrong to push multiple minor revs at one go - thanks.)

Revs:
17 - Sort the treeview after filling, in ascending str.lower order of column 1, SNIPPET_NAME
18 - Set search column for snippets_tv to 1 (SNIPPET_NAME) via Glade, so typing with the treeview focused jumps to first snippet beginning with typed text
19 - Set Tooltip Column of snippets_tv to 3 (SNIPPET_DESCRIPTION) via Glade, to display description when mouse pointer hovers over item.

Please review, and thank you in advance for feedback.