Footer bindings invisible on app launch

[darrenburns]

If I declare a binding in a widget, it doesn't appear on the new footer until I move my mouse:

footer-issue-textual.mov

In the video above, the footer is empty. When the mouse cursor moves, it populates.

MRE:

from textual.app import App, ComposeResult
from textual.binding import Binding
from textual.widgets import Footer, Input

class MyInput(Input):
    BINDINGS = [Binding("escape", "app.quit", "Exit Elia", key_display="esc")]

class FooterDelay(App[None]):
    def compose(self) -> ComposeResult:
        yield MyInput()
        yield Footer()

app = FooterDelay()
if __name__ == "__main__":
    app.run()

[TomJGooding]

Looks like the bad commit is 135fab6 - presumably the self.mouse_over check?

If you comment out the lines below on main, this example app works as expected but obviously multiple tests then fail.

textual/src/textual/app.py

Lines 2277 to 2278 in 6034065

	if self.mouse_over is None:
	return

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