Increase themeability of Clock, Signal, Wifi in statusbar

Now fixed negative numbers

Patch-set 2: Forgot cleanup log.

Patch-set 5: Compatibility with alt. signal layout

Change-Id: I6458998c37e7d9c07d389d851647bb98a15797f9
Signed-off-by: kecinzer <kecinzer@gmail.com>
(cherry picked from commit 3e29e8733e155338230c26a5c7c2625484e5cead)
Also fixes dBm signal text style.