Storing advanced settings and some clean-up

[Faboor]

Summary of changes:

• Form elements now have a proper name e.g. goBorderlessButton instead of button1
• Advanced check-box state and x/y position/size textboxes are stored in registry like other settings
• When borderless is triggered automatically, it will use parameters from advanced settings
• Replaced unused "Settings" button from tray context menu with "Show Borderless Minecraft" that re-opens the app window
• Refreshing the list when "Show all clients" is changed
• Moving event handlers assignment for settings to the Designer.cs, same as already used for buttons