Remove target blank from edit link.

functions.php

<?php
// Add this code to theme's functions.php
// Remove target blank from edit link.
// Check if function doest not exists.
if ( ! function_exists( 'rtmedia_wp_footer_add_js_callback' ) ) {
    function rtmedia_wp_footer_add_js_callback() {
        ?>
        <script type="text/javascript">
            jQuery(document).ready(function($) {
               	function remove_blank_target() {
	                jQuery( '.rtmedia-list .rtmedia-list-item' ).each( function(){
	                	var target = jQuery( this ).find( '.rtmedia-gallery-item-actions a:first' ).attr( 'target' );
	                    // Checked for the target attribute if it exists or not and is also set to blank.
	                    if ( target != 'undefined' ) {
	                        // Replace the blank target attribute to self target attribute.
	                        jQuery( this ).find( '.rtmedia-gallery-item-actions a:first' ).attr( 'target', '_self' );
	                    }
	                });
            	}

            	// Function for removing target blank
            	remove_blank_target();

            	// Remove target blank when new elements are added
            	jQuery('.rtmedia-list').bind("DOMSubtreeModified",function(){
			remove_blank_target();
		});

            });
        </script>
        <?php
    }
}
add_action( 'wp_footer', 'rtmedia_wp_footer_add_js_callback' );