fix(ui): adjust margins for bulk actions buttons in Spotify-ish and Ligera

Signed-off-by: Deluan <deluan@navidrome.org>

ui/src/themes/ligera.js

@@ -448,6 +448,11 @@ export default {
         backgroundColor: bLight['500'],
       },
     },
+    RaButton: {
+      button: {
+        margin: '0 5px 0 5px',
+      },
+    },
     RaPaginationActions: {
       button: {
         backgroundColor: '#fff',

ui/src/themes/spotify.js

@@ -389,6 +389,11 @@ export default {
         marginRight: '1rem',
       },
     },
+    RaButton: {
+      button: {
+        margin: '0 5px 0 5px',
+      },
+    },
     RaPaginationActions: {
       currentPageButton: {
         border: '1px solid #b3b3b3',