Bundle name

Add CFBundleName to show friendly name in Mac OS menubar
handle timestamp more flexiable
expand "recent updated" on first use
adjust the space between the icon column and file column
fixed expanded repo categories when switching account
set file browser name to "Cloud File Browser"
hide go home button in file browser

Since we have nav bar now.
Merge pull request #262 from Bamaan/patch-1

Bundle name
Merge pull request #263 from haiwen/patch-16

adjust the space between the icon column and file column
updated i18n
update translations
add a right click menu for item
remove gohome_action along with navigation functionality of context menu(triggered by right click)
fix some typos and ensure icon shown in the context menu