Fix strings typo

[TakWolf]

Fix some strings typo

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[dacap]

Thanks @TakWolf! I think we can merge first two commits, but I see some problems with the third one ( 73dc522 ), because we need to specify two && in some cases, e.g.

With the patch:

Original:

Other regressions introduced:

[TakWolf]

I withdrew the third commit.
But I don't understand the principle.
What is the uniqueness of these four places？There are also cases where a single ‘&’ is used elsewhere.

[dacap]

What is the uniqueness of these four places？

In these places the & has a special meaning (to indicate which character acts like a shortcut/mnemonic to quickly access the action) and that character will be underscored (so a special text drawing function is used, one that processes the & chars in a special way). I'm not sure if it's working on all those places (e.g. in "Guides && Slices" shouldn't be the case), but probably it's something to fix in the future as it's low priority.