Describe the bug
The DatePicker component behaves unexpectedly when it is part of an HTML form that has a Submit button. The things that happen are as follows:

1. If you focus the DatePicker and press Enter, the popup of the component opens
2. If there are two DatePickers inside the HTML form, focusing on the second DatePicker and pressing Enter, opens the popup of the first DatePicker

To Reproduce

Scenario 1:

1. Open this project
2. Focus the DatePicker and press Enter

Scenario 2:

1. Open this project
2. Focus on the second DatePicker and press Enter

Expected behavior
When pressing Enter inside the HTML form, the form should be submitted and no DatePicker popups should open

Describe the bug
When using the DatePicker with custom inputs, if you define a value in a random input and press Tab, a JS error appears.

To Reproduce

1. Open this demo
2. Click on the first input inside the DatePicker's DateInput
3. Press Tab

Expected behavior
The cursor should move to the next input

• Bug report

Current behavior

https://stackblitz.com/edit/mt45fg-d8vmdm?file=src/main.vue

The popup is Not appended to the div provided

Expected behavior

The popup is appended to the div provided

I'm submitting a...

• Bug report

Current behavior

When the Date Inputs or DropDowns are positioned at the bottom of a page, their popup continues to open below the input field. This causes the popup to appear beyond the browser's boundaries, making the users unable to use the popup.

Expected behavior

The position of the popups of the Date inputs and DropDowns should be automatically changed based on the available space below each of the components. If there is not enough space to open the popup below the component's input, the popup should appear above the input.

Minimal reproduction of the problem with instructions

1. Open this StackBliz example
2. Click on the "Open in a New Window" button at the right corner
3. In the opened browser window, scroll to the bottom of the page
4. Open the popup of the DropDownList

I would propose adding a floating label to the DatePicker element. When you have a form where all the other elements have floating labels and this single one doesn't, it really doesn't look good. So the option should be available the same as for other components. 

I'm submitting a bug report

Current behavior

When the DatePicker popup calendar is opened on a device with iOS 14.1, once the navigation arrow is clicked, the pop immediately closes

Expected behavior

Tapping on the navigation arrow should change the current calendar view and remain the popup opened.

Minimal reproduction of the problem with instructions

1. Open this demo on a mobile device with iOS 14.1
2. Open the calendar of the DatePicker and navigate it with the navigation arrows