Jump to and highlight ayah (fixes #462)

Changes made
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JumpFragment.java:
 - Reformatted whole class according to code style guide*
 - Changed positive button to neutral button (there is no negative button)
 - Used StringBuilder for building Surah titles
 - Removed redundant variable and for loop from suraSpinner's onItemSelected() method

layout/jump_dialog:
 - Reformatted the whole file according to code style guide
 - Changed "match_parent" (added API Level 8) to "fill_parent" (because min SDK is 7)
 - Set maxLength of page number EditText to 3 (max acceptable number is 604)

PagerActivity.java:
 - Added new method jumpToAndHighlight() (copy/pasted from QuranActivity.java)
 - OR'ed setSystemUiVisibility() flags for better readability

* The default right margin in Android Studio is 100.
I did not change this as there is nothing about right margin in the guideline.