               @click="changeTheme('classic')"
                      icon="circle"
                      color="deep-purple"
                      size="md"
                      ><q-tooltip>classic</q-tooltip>
                    </q-btn>
                    <q-btn
                      v-if="allowedThemes.includes('bitcoin')"
                      dense
                      flat
                      @click="changeTheme('bitcoin')"
                      icon="circle"
                      color="deep-ora