Missing tooltips for forum's functionality (voting a topic, comments count, topic count)

Because the functionality is represented through iconography and no labels are used, at least we could provide some tooltips for:

Topics View

• topic count (represented by megaphone)
• comments count (represented by comments bubble)
• topic vote (represented by thumbs-up)

Individual Topic View

• flag (not sure what is supposed to do)
• permalink (represented by a link)