I18N Issues

Hi,

“HEIC Support” is its plugin name but it has a clear meaning when this string shows on the WordPress Dashboard.
In some languages, like zh_TW, the translators don’t translate the plugin’s name but need to translate the plugin’s UI, so I made some modifications for this issue.

heic-support.php, Line 152 and 153

_x( 'HEIC Support', 'UI Strings', 'heic-support' ),
_x( 'HEIC Support', 'UI Strings', 'heic-support' ),

heic-support.php, Line 181
<h2><?php echo esc_html_x( 'HEIC Support', 'UI Strings', 'heic-support' ); ?></h2>

And one message can be translated.
heic-support.php, Line 210
$msg = __('no decode delegate for this image format \'HEIC\'', 'heic-support' );

All the above are based on version 1.0.1.