Fix home and end keys in prompts

[stefanhaller]

• PR Description

In #4404 we added home/end support to confirmation popups. This broke handling of the home/end keys in prompts, where they used to work as alternatives to ctrl-a and ctrl-e.

Here's one way (maybe not the best) to fix this.

A better fix is probably to have separate views for confirmations and prompts, so that we can have different keybindings for each. That's a bit more work though.

Leaving as draft for now so that we can decide which approach we want.

Fixes #4553.

[codacy-production]

Coverage summary from Codacy

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Coverage variation	Diff coverage
Report missing for 5d304091	✅ 0.00%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (5d30409)	Report Missing	Report Missing	Report Missing
Head commit (b040abd)	56358	48937	86.83%

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Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#4554)	2	0	0.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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