Rename property `Scale` to `Symbol scale` for text objects using musical symbols font

Your idea

Objects using musical text font have the properties Size (text size in pts) and Symbol size (symbol size in pts). However, objects using musical symbols font have the properties Size (text size in pts) and Scale (symbol scale in %).

It is not clear that Scale only applies to symbols, and the property should therefore be renamed to Symbol scale.

This applies to text objects using musical symbols font when both text and symbols are (or may be) present:

• string tunings
• pedal lines
• ottavas
• dynamics* with text

* Note that for dynamics without text, Scale is correct. However, when text is added to a dynamic it should be made clear that only the symbol component is affected. See also #32690.

Problem to be solved

Objects using musical text font:

Objects using musical symbols font:

Prior art

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Additional context

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