Fixed hotkeys, Font improvements, Show tips

• fix: some hotkeys did not work anymore after moving actions into "What's Up?" button
• font : several improvements
• showing/hiding columns: works correctly when moving from one log to another (with very different columns)
• Edit Log Settings - dialog - easy edit any log's settings (useful for new types of logs I'm about to add)
• Status pane: shows tips (can be turned off from Preferences)