Add basic Image Group functions

Make the Upload Pannel usable on mobile
Remove useless code as Django had built-in functions to read the config
Remove useless JS code
Cleanup tempaltes

gallery/themes/default/style.sass

@@ -7,6 +7,7 @@
 @import "components/elements/notification"
 @import "components/elements/pop-up"
 @import "components/elements/upload-panel"
+@import "components/elements/tags"
 
 @import "components/navigation"
 @import "components/banner"
@@ -46,6 +47,30 @@ html, body
     background-color: $white
     color: $black
 
+.big-text
+    height: 60vh
+
+    display: flex
+    flex-direction: column
+    justify-content: center
+    align-items: center
+
+    color: $black
+
+    h1
+        margin: 0 2rem
+        
+        font-size: 4rem
+        font-weight: 900
+        text-align: center
+
+    p
+        margin: 0 2rem
+
+        max-width: 40rem
+        font-size: 1rem
+        font-weight: 400
+        text-align: center
 
 .error-page
     width: 100%
@@ -77,10 +102,50 @@ html, body
 
         color: $white
 
+footer
+    margin: 0
+    padding: 0.25rem 1rem
+
+    width: 100%
+
+    display: flex
+    justify-content: center
+    align-items: center
+    gap: 1rem
+
+    background-color: $white
+
+    p
+        margin: 0
+        padding: 0
+
+        font-size: 0.75rem
+        font-weight: 400
+        text-align: center
+
+        color: $black
+    
+    a
+        margin: 0
+        padding: 0
+
+        font-size: 0.75rem
+        font-weight: 400
+        text-align: center
+
+        color: $primary
+
+
 @media (max-width: $breakpoint)
     .wrapper
         padding: 0 0 3.5rem 0
 
+    .big-text
+        height: calc(75vh - 3.5rem)
+
+        h1
+            font-size: 3.5rem
+
     .error-page
         height: calc(100vh - 3.5rem)