Add translatable address error message

[w0xlt]

This PR is an alternative to #533 that addresses #533 (review) .

While this PR no longer provides a detailed error message, it still brings some UI improvements:

. Improve user experience by showing an error message instead of just changing the color of QLineEdit
. Currently, when an invalid address is entered in custom change address, an error message is displayed. But the same does not happen in the Pay To field or when adding a new address in the address manager. This PR standardizes error handling for all address fields.
. The message added in this PR is the same as used in the custom change address, which is already translated into several languages.

PR

[DrahtBot]

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Reviews

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Type	Reviewers
Concept NACK	luke-jr
Concept ACK	jonatack

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Conflicts

Reviewers, this pull request conflicts with the following ones:

• #612 (refactor: Drop unused QFrames in SendCoinsEntry by hebasto)
• #560 (Make error message layout consistent by w0xlt)
• #533 (Add more detailed address error message by w0xlt)

If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.

[hebasto]

Is hardcoded red color visually compatible with dark themes/appearance? Maybe add some relevant screenshots?

[w0xlt]

There is a screenshot posted by @jonatack here:
#534 (review)

But this style is already used in sendcoinsdialog.ui and sendcoinsdialog.cpp for invalid custom change addresses and insufficient funds , so it seems to be a well tested configuration.

[jonatack]

Concept ACK. Here's a screenshot on Debian in dark mode.

[luke-jr]

A constant message seems as useless as the red background colour. Concept NACK

[DrahtBot]

🐙 This pull request conflicts with the target branch and needs rebase.

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[DrahtBot]

There hasn't been much activity lately and the patch still needs rebase. What is the status here?

• Is it still relevant? ➡️ Please solve the conflicts to make it ready for review and to ensure the CI passes.
• Is it no longer relevant? ➡️ Please close.
• Did the author lose interest or time to work on this? ➡️ Please close it and mark it 'Up for grabs' with the label, so that it can be picked up in the future.

[DrahtBot]

There hasn't been much activity lately and the patch still needs rebase. What is the status here?

• Is it still relevant? ➡️ Please solve the conflicts to make it ready for review and to ensure the CI passes.
• Is it no longer relevant? ➡️ Please close.
• Did the author lose interest or time to work on this? ➡️ Please close it and mark it 'Up for grabs' with the label, so that it can be picked up in the future.

[DrahtBot]

There hasn't been much activity lately and the patch still needs rebase. What is the status here?

• Is it still relevant? ➡️ Please solve the conflicts to make it ready for review and to ensure the CI passes.
• Is it no longer relevant? ➡️ Please close.
• Did the author lose interest or time to work on this? ➡️ Please close it and mark it 'Up for grabs' with the label, so that it can be picked up in the future.

[hebasto]

Closing due to lack of interest.