fix: Performance improvements avoid expensive calculations

[eonarheim]

===:clipboard: PR Checklist :clipboard:===

• 📌 issue exists in github for these changes
• 🔬 existing tests still pass
• 🙈 code conforms to the style guide
• 📐 new tests written and passing / old tests updated with new scenario(s)
• 📄 changelog entry added (or not needed)

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This PR adds some small performance enhancements to avoid recalculation if unneeded, gives decent performance boost. Smooths out the FPS a bit

Before improvements:

After improvements:

Related to road map graphics performance improvements #1161

Changes:

• Calculate sprite dimensions only if needed
• Calculate graphics transform only if needed
• Update text only if needed