JS-357: Fix theme variable's names

Author: anastasiiabuniak

app/design/frontend/Magento/blank/etc/view.xml

@@ -199,13 +199,10 @@
             <var name="fullscreen">
                 <var name="nav">thumbs</var> <!-- Fullscreen navigation style (false/thumbs/dots) -->
                 <var name="loop">true</var> <!-- Fullscreen navigation loop (true/false/null) -->
-                <var name="keyboard">true</var> <!-- Turn on/off keyboard arrows navigation (true/false/null) -->
                 <var name="arrows">false</var> <!-- Turn on/off arrows on the sides preview in fullscreen (true/false/null) -->
                 <var name="caption">false</var> <!-- Display alt text as image title in fullscreen(true/false) -->
                 <var name="navdir">horizontal</var> <!--Sliding direction of thumbnails in fullscreen(horizontal/vertical)  -->
                 <var name="navtype">thumbs</var> <!-- Sliding type of thumbnails (slides/thumbs) -->
-                <var name="thumbwidth">150</var> <!-- Width of thumbnails in fullscreen -->
-                <var name="thumbheight">150</var> <!-- Height of thumbnails in fullscreen -->
                 <var name="transition">
                     <var name="effect">dissolve</var> <!-- Sets transition effect for slides changing (slide/crossfade/dissolve) -->
                     <var name="duration">500</var> <!-- Sets transition duration in ms -->

app/design/frontend/Magento/luma/etc/view.xml

@@ -203,14 +203,11 @@
             <var name="fullscreen">
                 <var name="nav">thumbs</var> <!-- Fullscreen navigation style (false/thumbs/dots) -->
                 <var name="loop">true</var> <!-- Fullscreen navigation loop (true/false/null) -->
-                <var name="keyboard">true</var> <!-- Turn on/off keyboard arrows navigation (true/false/null) -->
                 <var name="arrows">false</var> <!-- Turn on/off arrows on the sides preview in fullscreen (true/false/null) -->
                 <var name="caption">false</var> <!-- Display alt text as image title in fullscreen(true/false) -->
                 <var name="navdir">horizontal</var> <!--Sliding direction of thumbnails in fullscreen(horizontal/vertical)  -->
                 <var name="navarrows">false</var> <!-- Turn on/off on the thumbs navigation sides arrows(true/false) -->
                 <var name="navtype">thumbs</var> <!-- Sliding type of thumbnails (slides/thumbs) -->
-                <var name="thumbwidth">150</var> <!-- Width of thumbnails in fullscreen -->
-                <var name="thumbheight">150</var> <!-- Height of thumbnails in fullscreen -->
                 <var name="transition">
                     <var name="effect">slide</var> <!-- Sets transition effect for slides changing (slide/crossfade/dissolve) -->
                     <var name="duration">500</var> <!-- Sets transition duration in ms -->