refactor: modal-move-page -> vue component

client/js/store/modules/modal-move-page.js

@@ -0,0 +1,16 @@
+'use strict'
+
+export default {
+  namespaced: true,
+  state: {
+    shown: false
+  },
+  getters: {},
+  mutations: {
+    shownChange: (state, shownState) => { state.shown = shownState }
+  },
+  actions: {
+    open({ commit }) { commit('shownChange', true) },
+    close({ commit }) { commit('shownChange', false) }
+  }
+}