Set variables from within theme file

theme/solidaric/theme.json

@@ -1,4 +1,9 @@
 {
+    "newswire-publish-icon": True,
+    "full-width-timeline-buttons": False,
+    "icons-as-buttons": False,
+    "rss-icon-at-top": True,
+    "publish-button-at-top": False,
     "font-size-pgp-key2": "18px",
     "button-corner-radius": "5px",
     "column-left-icons-margin": "15px",