Adds new feature to allow user to toggle filters on and off

Signed-off-by: Powdered Toast Man <toastmanpowdered@gmail.com>
Coding standards

Signed-off-by: Powdered Toast Man <toastmanpowdered@gmail.com>
Coding standards

Signed-off-by: Powdered Toast Man <toastmanpowdered@gmail.com>
Use jQuery to toggle filter controls visibility with no page refresh

Signed-off-by: Powdered Toast Man <toastmanpowdered@gmail.com>
Show a message when no filters are visible

Signed-off-by: Powdered Toast Man <toastmanpowdered@gmail.com>
Proper use of wp_stream_filter_input

Signed-off-by: Powdered Toast Man <toastmanpowdered@gmail.com>
Fix JS code sniffs

Signed-off-by: Powdered Toast Man <toastmanpowdered@gmail.com>
Disable sibling checkboxes while ajax request is in progress

Signed-off-by: Powdered Toast Man <toastmanpowdered@gmail.com>
Update Polish translation
Add missing text domain
Update Polish entry
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'master' into enhancement/329-hide-filters-options

Signed-off-by: Powdered Toast Man <toastmanpowdered@gmail.com>

Conflicts:
	includes/admin.php
	includes/list-table.php
Remove unused function argument

Signed-off-by: Powdered Toast Man <toastmanpowdered@gmail.com>
Merge pull request #349 from Powdered-Toast-Man/enhancement/329-hide-filters-options

Adds new feature to allow user to toggle filters on and off
Merge branch 'master' into develop

Conflicts:
	includes/list-table.php