fix: always show memo

[stanleyyconsensys]

Explanation

This PR update sign txn dialog to always show memo
We dont apply to other txn dialog, becoz in MM there is no way to add memo

With no Memo

With Memo

References

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

[wantedsystem]

LGTM