1. clean code;
2. handle the right margin of status bar differently since the position of items re-arranged.
change the close icons for onyx dialog.
1.changed popup menu itme's icon.
2.reduce popup menu item's text width.
Merge branch 'casa_del_libro' of github.com:onyx-intl/booxsdk into casa_del_libro
use a new style of the power management dialog.
add menu item's back ground in reader.
Merge branch 'casa_del_libro' of github.com:onyx-intl/booxsdk into casa_del_libro
improve wifi_dialog
Merge branch 'casa_del_libro' of github.com:onyx-intl/booxsdk into casa_del_libro
fixed the bug that can not touch the ap config dialog.
only retry 3 three times of scanning.
add tags for chache book shop pixmap.
fix the bug that user cannot touch keyboard in wifi dialog while starting device and improve the dialog.
Merge branch 'casa_del_libro' of github.com:onyx-intl/booxsdk into casa_del_libro
improve wifi signal png.
improve the wifi icons.
Merge branch 'casa_del_libro' of github.com:onyx-intl/booxsdk into casa_del_libro
improve popup menu in landscape mode.
1. improve the signal level accuracy by using signal level instead of quality;
2. reduce the time for authentication failed handling.
fixed need to click "close icon" two time to close popup menu.