Text Editor leaves a \<br> tag behind when erasing the whole text.

[palagadec]

• Framework7 version: 6.3.16
• Platform and Target: Safari browser in macOs (not tested on other platforms other than Chrome in macOs)
• Live Link (issue visible directly in your demo) : Text Editor demo

Describe the bug

On Safari browser (tested on macOs), the text editor component leaves a single <br> tag behind when erasing the text, which prevents it from being empty and thus display the placeholder or handling empty text validation.

It seems to work well on chrome (see screenshots)

To Reproduce

Steps to reproduce the behavior:

1. Go to Text Editor demo on Safari
2. Type text in the text editor (with placeholder to see directly)
3. Erase the text
4. Notice the issue

Screenshots (taken from Text Editor demo)

Safari (after erasing text):

Chrome (after erasing text) :