Changes
/* Configuration guidelines */
* The '''maximum number of tabs is 6'''. Once this limit is exceeded, the configuration is invalid and won't be shown.
* The captions of tabs are optional. In case there's only one tab, the tab will be invisible.
* The '''buttons ''' should always be '''nested inside tabs'''. Otherwise, the configuration is also invalid.
* Captions and icons of buttons are optional. Default values are used for the unspecified ones.
* While configuring the custom intent button, one should always specify one and only one of the target class and the target URI. Otherwise, the button is invalid and an error will be shown.
