NikV

function modifygform_entrydetail_update_button() {
	$mode = empty( $_POST['screen_mode'] ) ? 'view' : $_POST['screen_mode'];

	$button_text      = $mode == 'view' ? __( 'Update Entry', 'gravityforms' ) : __( 'Update Entry', 'gravityforms' );
	$disabled         = $mode == 'view' ? '' : ' disabled="disabled" ';
	$update_button_id = $mode == 'view' ? 'gform_edit_button' : 'gform_update_button';
	$button_click     = $mode == 'view' ? "jQuery('#screen_mode').val('edit');" : "jQuery('#action').val('update'); jQuery('#screen_mode').val('view');";
	$update_button    = '<input id="' . $update_button_id . '" ' . $disabled . ' class="button button-large button-primary my-custom-button-class" type="submit" tabindex="4" value="' . esc_attr( $button_text ) . '" name="save" onclick="' . $button_click . '"/>';
	return $update_button;

NikV

function modify_gform_delete_entry_link() {
	global $lead;

	return '<a data-wp-lists="delete:gf_entry_list:lead_row_' . esc_attr( $lead['id'] ) . '::status=delete&entry=' . esc_attr( $lead['id'] ) . '" title="' . esc_attr__( 'Delete this entry permanently', 'gravityforms' ) . '"  href="' . wp_nonce_url( '?page=gf_entries', 'gf_delete_entry' ) . '">' . esc_html__( 'Delete', 'gravityforms' ) . '</a>';


}
add_filter('gform_delete_entry_link', 'modify_gform_delete_entry_link');

NikV

function modify_gform_uninstall_button() {
	return '<input type="submit" name="uninstall" value="' . esc_attr__( 'Say Goodbye to Gravity Forms', 'gravityforms' ) . '" class="button" onclick="return confirm(\'' . esc_js( __( "Hi Client, just a quick Warning. ALL Gravity Forms data, including form entries will be deleted. This cannot be undone. 'OK' to delete, 'Cancel' to stop. If you'd like to keep anything, please export your form data", 'gravityforms' ) ) . '\');"/>';

}
add_filter('gform_uninstall_button', 'modify_gform_uninstall_button');

NikV

add_filter('gform_hipchat_verify_ssl', '__return_false');

NikV

//advanced - more control
add_filter( 'gquiz_answer_indicator', 'gquiz_answer_indicator', 10, 7);
function gquiz_answer_indicator ($indicator_markup, $form, $field, $choice, $lead, $is_response_correct, $is_response_wrong){
	if ( $is_response_correct )
		$indicator_markup = ' (you got this one right!)';
	elseif ( $is_response_wrong ) {
		if  ( $field['inputType'] == 'checkbox' && rgar( $choice, 'gquizIsCorrect' ) )
			$indicator_markup = ' (you missed this one!)';
		else
			$indicator_markup = ' (you got this one wrong!)';