Fixed task reset bug in pagination links

unlike the regular joomla pagination links, where form task is left untouched,
redCORE pagination set the task to '', as it is forcing the form parameter of
submitform function.
Merge pull request #158 from julienV/pagination-task-reset

Fixed task reset bug in pagination links
#RSBTB-305 #comment fixing rmedia

Placing modal at the center of the screen
Merge pull request #159 from PetarT/develop

#RSBTB-305 #comment fixing rmedia