chore(vue): use g for consistency with Flask

lnbits/templates/base.html

@@ -19,7 +19,7 @@
 
       <q-header bordered class="bg-lnbits-dark">
         <q-toolbar>
-          <q-btn dense flat round icon="menu" @click="w.visibleDrawer = !w.visibleDrawer"></q-btn>
+          <q-btn dense flat round icon="menu" @click="g.visibleDrawer = !g.visibleDrawer"></q-btn>
           <q-toolbar-title><strong>LN</strong>bits</q-toolbar-title>
           <q-badge color="yellow" text-color="black">
             <span><span v-show="$q.screen.gt.sm">USE WITH CAUTION - LNbits wallet is still in </span>BETA</span>
@@ -30,7 +30,7 @@
         </q-toolbar>
       </q-header>
 
-      <q-drawer v-model="w.visibleDrawer" side="left" :width="($q.screen.lt.md) ? 260 : 230" show-if-above :elevated="$q.screen.lt.md">
+      <q-drawer v-model="g.visibleDrawer" side="left" :width="($q.screen.lt.md) ? 260 : 230" show-if-above :elevated="$q.screen.lt.md">
         {% block drawer %}
           <lnbits-wallet-list></lnbits-wallet-list>
           <lnbits-extension-list class="q-pb-xl"></lnbits-extension-list>