(fix) allow any plugin can make content editable

Signed-off-by: Dan Selman <danscode@selman.org>

Author: dselman

src/PluginManager.js

@@ -54,21 +54,21 @@ export default class PluginManager {
   }
 
   /**
-   * All plugins must return true for the plugin manager
-   * to be editable.
+   * If any plugin returns isEditable (true) then
+   * the content is editable
    *
    * @param {Value} value the Slate value
    * @param {string} code the type of edit requested
    */
   isEditable(value, code) {
     for (let n = 0; n < this.plugins.length; n += 1) {
       const plugin = this.plugins[n];
-      if (plugin.isEditable && !plugin.isEditable(value, code)) {
-        return false;
+      if (plugin.isEditable && plugin.isEditable(value, code)) {
+        return true;
       }
     }
 
-    return true;
+    return false;
   }
 
   /**