`TextEdit` shows no content when inside of a `StripBuilder` that doesn't have enough width

**Describe the bug**
`TextEdit` gets displayed, but with no content, nor position bar, when inside of a `StripBuilder` that doesn't have enough width.

**To Reproduce**
Steps to reproduce the behavior:
1. Clone my forked egui repo: [egui](https://github.com/IVAN-MK7/egui/tree/issue-textedit-no-content-if-not-enough-width) and switch to the `issue-textedit-no-content-if-not-enough-width` branch
2. `cargo run -p egui_demo_app'
3. Open the "Grid Test" window on the bottom right corner of the `Demos` tab
4. Select and try to edit the 2nd `TextEdit` widget: it won't show any content, nor the blinking position bar
5. From the `crates\egui_demo_lib\src\demo\tests\grid_test.rs` switch from the `problematic_width` to the `working_width` and retry the test again: both its content and the position bar will be shown

**Expected behavior**
The `TextEdit` should not appear in full, or clearly display a warning to the user regarding it's inability to display content.

**Screenshots**

With `problematic_width`:

With `working_width`:

**Desktop (please complete the following information):**
- OS: Windows 10 22H2

Start by running `cargo run -p egui_demo_app` and reproduce the issue in the Grid Test window. Read `crates/egui_demo_lib/src/demo/tests/grid_test.rs`, comparing `problematic_width` with `working_width`, then trace the `TextEdit` and `StripBuilder` layout behavior involved. Done means the constrained widget either remains visibly usable or clearly warns that its content cannot be displayed.

Written by the indexing model from the issue text.