ImpressPages 4.4.1

Improved pages management usability and added other improvements / bug fixes.

• Fixed bug when default value for checkbox was not being set in plugin options
• Fixed bug which didn't allow to restore the default font for inline logo
• Fixed pasting into an empty menu (829b2)
• Fixed creating new page in the bottom posistions is 
• Improved drag & drop placeholder position calculation
• GRID createFormFilter and updateFormFilter configuration options
• Check if sessions are working during the installation process
• Fixed GRID ordering when field attribute is missing #642
• ipUser()->data() returns empty array if user is not logged instead of PHP warning before