Improve I18N Issues (Based on 1.5.1)

I modified some I18N codes to improve I18N issues.

bottom-admin-toolbar.php

Line 79

__( 'Activate in Admin Area', 'bottom-admin-toolbar' ),

Line 98

<?php esc_html_e( 'Yes', 'bottom-admin-toolbar' ); ?>

Line 101

<?php esc_html_e( 'No', 'bottom-admin-toolbar' ); ?>

Line 136

submit_button(__('Save Changes', 'bottom-admin-toolbar' ));