Improve settings panel

[alfongj]

The current settings panel is not finished in its aesthetic part. The following things need to be changed:

• If possible, make the panel draggable
• Use an icon for teh close button (actually its the letter 'X' xD )
• Fix the alignment of the settings to look the same in all tabs
• Possibily change the styles of titles and such

[alfongj]

On 12a099e the 1st and 2nd things were improved, using a TitleWindow as the parent of the Settings class

[alfongj]

Improved little things, added dumping of file settings to global ones