Fix translations for watermark spacers

[omar-ahmed42]

Description

Fix translations by adding a space between width/height and spacer and capitalize the first letter.

Closes #(issue_number)

Checklist

• I have read the Contribution Guidelines
• I have performed a self-review of my own code
• I have attached images of the change if it is UI based
• I have commented my code, particularly in hard-to-understand areas
• If my code has heavily changed functionality I have updated relevant docs on Stirling-PDFs doc repo
• My changes generate no new warnings
• I have read the section Add New Translation Tags (for new translation tags only)

[github-actions]

🚀 Translation Verification Summary

🔄 Reference Branch: pr-branch

📃 File Check: messages_el_GR.properties

1. Test Status: ✅ Passed
2. Test Status: ✅ Passed

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📃 File Check: messages_en_US.properties

1. Test Status: ✅ Passed
2. Test Status: ✅ Passed

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📃 File Check: messages_fr_FR.properties

1. Test Status: ✅ Passed
2. Test Status: ✅ Passed

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📃 File Check: messages_ga_IE.properties

1. Test Status: ✅ Passed
2. Test Status: ✅ Passed

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📃 File Check: messages_hu_HU.properties

1. Test Status: ✅ Passed
2. Test Status: ✅ Passed

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📃 File Check: messages_id_ID.properties

1. Test Status: ✅ Passed
2. Test Status: ✅ Passed

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📃 File Check: messages_pt_BR.properties

1. Test Status: ✅ Passed
2. Test Status: ✅ Passed

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📃 File Check: messages_pt_PT.properties

1. Test Status: ✅ Passed
2. Test Status: ✅ Passed

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📃 File Check: messages_ru_RU.properties

1. Test Status: ✅ Passed
2. Test Status: ✅ Passed

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📃 File Check: messages_sv_SE.properties

1. Test Status: ✅ Passed
2. Test Status: ✅ Passed

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📃 File Check: messages_uk_UA.properties

1. Test Status: ✅ Passed
2. Test Status: ✅ Passed

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📃 File Check: messages_zh_TW.properties

1. Test Status: ✅ Passed
2. Test Status: ✅ Passed

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✅ Overall Check Status: Success

Thanks @omar-ahmed42 for your help in keeping the translations up to date.