fix(segment-picker): fix no hidden animation (#646)

* fix(segment-picker): fix no hidden animation

* fix(time-picker): value last choose was changed when open again

* test(time-picker): add the value of the selected test

src/components/segment-picker/segment-picker.vue

 <template>
-  <div class="cube-segment-picker" v-show="isVisible">
+  <div class="cube-segment-picker">
     <!-- Direct props will recover the property from v-bind Object expect 'is'. -->
     <!-- To ensure the priority of v-bind Object which is from user configure, we check the property of item in every prop. -->
     <component

src/components/time-picker/time-picker.vue

@@ -258,8 +258,8 @@
       _updateSelectedIndex() {
         const value = this.value
         const minTime = this.minTime
-
-        if (value <= +minTime) {
+        // fix the value last choose was changed when time-picker is opened again
+        if (value < Math.floor(minTime / MINUTE_TIMESTAMP) * MINUTE_TIMESTAMP) {
           this.selectedIndex = [0, 0, 0]
         } else {
           // calculate dayIndex

test/unit/specs/time-picker.spec.js

@@ -235,6 +235,36 @@ describe('TimePicker', () => {
     console.warn = originWarn
   })
 
+  it('should show the value last choose when time-picker is opened again', function (done) {
+    const selectHandle = sinon.spy()
+    vm = createPicker({
+    }, {
+      select: selectHandle
+    })
+    new Promise((resolve) => {
+      vm.show()
+      vm.selectedIndex = [0, 1, 0]
+      setTimeout(() => {
+        let confirmBtn = vm.$el.querySelector('.cube-picker-confirm')
+        confirmBtn.click()
+        let value = selectHandle.lastCall.args[0]
+        setTimeout(() => {
+          resolve(value)
+        })
+      }, 100)
+    }).then((firstValue) => {
+      vm.show()
+      setTimeout(() => {
+        let confirmBtn = vm.$el.querySelector('.cube-picker-confirm')
+        confirmBtn.click()
+        let value = selectHandle.lastCall.args[0]
+        expect(firstValue)
+          .to.be.equal(value)
+        done()
+      }, 100)
+    })
+  })
+
   testMinuteStep()
 
   testMin()