Enable Magnific Popup gallery view on small screens

[casa-albore]

• This is a feature request.
• I have updated all gems with bundle update.
• I have tested locally with bundle exec jekyll build.

---

The Magnific popups for gallery views has what I consider 'bad' behavior on small screens (phones) where clicking on an image will display the full-size image but will not show 'forward' or 'back' icons as is the case on larger screens.

This makes it impossible on telephones with smaller screens to browse the gallery with photos filling the screen.

The following change made the gallery navigation function again on phones:

diff --git a/assets/js/_main.js b/assets/js/_main.js
index 796e126..fca8edd 100644
--- a/assets/js/_main.js
+++ b/assets/js/_main.js
@@ -45,7 +44,7 @@ $(document).ready(function(){
   // Magnific-Popup options
   $(".image-popup").magnificPopup({
     disableOn: function() {
-      if( $(window).width() < 500 ) {
+      if( $(window).width() < 100 ) {
         return false;
       }
       return true;