Fixes #232: privacy option copy should be 'is private' instead of dynamic text

pinry-spa/src/components/BoardEdit.vue

@@ -22,7 +22,7 @@
                        :type="createModel.form.private.type"
                        :message="createModel.form.private.error">
                 <b-checkbox v-model="createModel.form.private.value">
-                    {{ createModel.form.private.value?"only visible to yourself":"visible to everyone" }}
+                    is private
                 </b-checkbox>
               </b-field>
           </div>
@@ -42,7 +42,7 @@
                        :type="editModel.form.private.type"
                        :message="editModel.form.private.error">
                 <b-checkbox v-model="editModel.form.private.value">
-                    {{ editModel.form.private.value?"only visible to yourself":"visible to everyone" }}
+                    is private
                 </b-checkbox>
               </b-field>
           </div>

pinry-spa/src/components/pin_edit/PinCreateModal.vue

@@ -32,7 +32,7 @@
                        :type="pinModel.form.private.type"
                        :message="pinModel.form.private.error">
                 <b-checkbox v-model="pinModel.form.private.value">
-                    {{ pinModel.form.private.value?"only visible to yourself":"visible to everyone" }}
+                    is private
                 </b-checkbox>
               </b-field>
               <b-field label="Image Referer"