Added `DataView.getAllSelectedRows` to allow getting all the selected rows on all the pages (#542)
Added `DataView.getAllSelectedRows` to allow getting all the selected rows on all the pages (#542)

* added `composer.json` to allow fetching of SlickGrid as `composer` package

* feat(plugins): add header/grid menu item "hidden" property
- in some cases we might want to use "disabled" but in other cases we might want to use "hidden"

* refactor(plugins): add "hidden" property to HeaderButton plugin as well

* refactor(plugins): add "hidden" property to all plugins with menu items

* refacor(plugins): add "hidden" property everywhere potentially called

* dataview.getSelectedRows

* changes based on the pull-request review

Signed-off-by: arash dalir <e4ea294c062c525643df036a35ca579b905fa400@gemik.com>

* renamed `DataView.getSelectedRows()`

to `DataView.getAllSelectedRows()`

Co-authored-by: arash dalir <e4ea294c062c525643df036a35ca579b905fa400@gemik.com>
Co-authored-by: ghiscoding <da204b175f70b2dfd3c735e35b645f4174e25e8a@gmail.com>
6pac/SlickGrid,6pac/SlickGrid