Allow override of "create" permission for model index

src/components/model-crud/ByjoveModelCrud.vue

@@ -35,7 +35,7 @@
     <slot></slot>
 
     <div v-if="showButtons"
-         class="buttons">
+         class="buttons" style="margin-top: 1rem;">
       <b-button :type="getSaveButtonType()"
                 :icon-left="getSaveButtonIcon()"
                 :disabled="saveDisabled"

src/components/model-index/ByjoveModelIndex.vue

@@ -8,7 +8,7 @@
     </nav>
 
     <div class="buttons"
-         v-if="allowCreate && hasModelPerm('create')">
+         v-if="allowCreate && userCanCreate()">
       <b-button class="new-object"
                 type="is-primary"
                 tag="router-link"
@@ -66,6 +66,7 @@ export default {
             type: Boolean,
             default: true,
         },
+        createPermCheck: Function,
         paginated: {
             type: Boolean,
             default: true,
@@ -182,6 +183,13 @@ export default {
             return this.getModelSlug()
         },
 
+        userCanCreate() {
+            if (this.createPermCheck) {
+                return this.createPermCheck()
+            }
+            return this.hasModelPerm('create')
+        },
+
         hasModelPerm(perm) {
 
             // do normal check, but first add prefix