Blueberry minor issues

[ibennetch]

@movahhedi

• When there are too many users for one page of the User Account tab, the pagination area doesn't seem to fit with the rest of the theme:

• Also, on the "Databases" tab I have a warning text that "Note: Enabling the database statistics here might cause heavy traffic between the web server and the MySQL server." which is not very readable. This is at the dialog where I could enable statistics.

• Similarly, from the main/home page if I click on Export, the list of possible databases listed is unstyled when selected (when deselected, it looks fine):