Activity Administration screen notice in display method

[imath]

"Indirect modification of overloaded property BP_Activity_List_Table::$_args has no effect"

I wonder what is the goal of what's causing this notice on line 1141 :
extract( $this->_args );

I don't see any use of the extracted vars in BP_Activity_List_Table->display().

I suggest to simply remove this line.

[imath]

Just noticed the group administration screen was also displaying a notice, reason why i've added 5663.02.patch

[djpaul]

In 8485:

Admin screens: remove redundant extract() calls.

Removes PHP warnings about indirect modification of overloaded properties..

Fixes #5663, props imath.