Refactor on Capture View UI phase I:
1.Bottom buttons bar
2.Colors bar
3.Fullscreen picture
refactor on caputure view phase II:
1. move all onClick action into onClick() function in main activity
rename "pager" to "main_pager"
change the colors bar's appearance in capture view
UI: fade in the colors bar after the color analysis is done
sort the palette items by the updated time in list/card view
add the title bar to show picture name in capture view