[BUG] Panic when resizing the Terminal too small

[FriederHannenheim]

Describe the bug

thread '<unnamed>' panicked at 'assertion failed: `(left == right)`
  left: `1`,
 right: `2`: Was promised 2, received 1', /home/fried/.cargo/registry/src/github.com-1ecc6299db9ec823/cursive_core-0.3.7/src/views/edit_view.rs:513:9

To Reproduce
Create a layout with an edit view and resize the terminal very small

Expected behavior
It doesn't crash and when I resize it back to big the layout is still there

Environment

• Linux
• Backend used: crossterm
• Current locale (run locale in a terminal)

LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC=de_DE.UTF-8
LC_TIME=de_DE.UTF-8
LC_COLLATE="en_US.UTF-8"
LC_MONETARY=de_DE.UTF-8
LC_MESSAGES="en_US.UTF-8"
LC_PAPER=de_DE.UTF-8
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT=de_DE.UTF-8
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

• Cursive version (from crates.io, from git, ...)
  0.20.0 from crates.io

Additional context
Terminal used: Alacritty

[gyscos]

Hi, and thanks for the report! Will have a look.

[gyscos]

Would you happen to have an example that can cause the crash? I'm trying with the edit example, but it doesn't seem to crash when resized as small as possible.