Calculator bugfixes. Fix crash on mdpi and hdpi devices. Tweaks to the app icon

Change-Id: I28b223bc594badf8768016b415b36fff8a78dbfa
Animate the theme change smoothly

Instead of relaunching the settings screen with the default animation,
use a smooth fade effect between the old and new screen. In addition,
preserve the user's scroll position.

Change-Id: Ica7f3b461729034bd305f34d591a21fc45104b93
Calculator: ES translations

Change-Id: I8004551ed5feaf21f42c9db1e58b082a5227d2d6
Calculator: fix merge fail

Translations were reverted in http://review.cyanogenmod.org/50975, fix that.

Change-Id: Ieb8c56c72ee41a6dd906b0fba0775f963dccb707