Browser: zh-rTW translations

Change-Id: I9c681787bcce79cd2e402a7b4281aac171a4d28c
Browser: UG translations

Change-Id: Icd243090b9117c7c7b07685699ef5163f1cacb26
Browser: fix weird behavior in the settings

The summary of the text encoding preference should always be displayed.

Change-Id: I5620cc147bdda078b9350f82b68b3d86774bc09c