Mail adjustments for #51

[bell07]

As diskussed in #51 Attribute added "contrast_bg" themes, default is still "gui_formbg.png" Use the contrast_bg in mail app and sticky notepad Changed Inbox/Sentbox button to 2x icon textures

[Gerold55]

can the buttons for the received and sent be shrunk down do same size as the other buttons?

[bell07]

Sure, but I like it to highlight them because it is a major functionality button. Feel free to adjust them: Modify the lines https://github.com/Gerold55/laptop/blob/master/apps/mail_app.lua#L82 https://github.com/Gerold55/laptop/blob/master/apps/mail_app.lua#L84

0,8.8;1.5,1.5 => x=0, y= 8.8, w and h is 1.5

I am AFK for today

[Gerold55]

Ok 👍