fix: avoid word wrapping for single word settings values

[Ldoppea]

When a setting label is single line and its setting value is single line, everything is displayed correctly

When a setting label is multi line and its value is single word, then
the value may not succeed to require enough space and so it may wrap in
the middle of the word and it becomes multi line

When a setting label is multi line and its value is multi words, then
the value succeed to require enough space to be displayed correctly

With MinimumWidthRequest=100 and LineBreakMode=WordWrap, all three
previous cases are displayed correctly without excessive wrapping

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⚠️ this solution is a hack more than a real solution. Hopefully the MinimumWidthRequest does not force the label to have a width of 100 if it is smaller. Sadly I don't really understand why this work 🙃

It has been tested on Android and iOS and in French and English

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Examples (left = previous, right = new, background colors are here to vizualise layout space)

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English version is not impacted as it has very concise texts

[Ldoppea]

Note that the following solutions has been tested:

• Using a grid instead of a StackLayout -> same behaviour (or even worse)
• Setting wordwrap only -> no effect
• Removing wordwrap -> long options like Au démarrage de l'application are now single line and break the UI
• Setting margins instead of paddings (paddings are part of the problem) -> no acceptable effect