Improve localization of {els} string on Create Account page

[quiple]

Makes it easier to localize by providing full context.

#: src/screens/Signup/StepInfo/Policies.tsx:74
#~ msgid "By creating an account you agree to the {els}."
#~ msgstr ""

#: src/screens/Signup/StepInfo/Policies.tsx:70
msgid "By creating an account you agree to the <0>Privacy Policy</0>."
msgstr ""

#: src/screens/Signup/StepInfo/Policies.tsx:46
msgid "By creating an account you agree to the <0>Terms of Service</0> and <1>Privacy Policy</1>."
msgstr ""

#: src/screens/Signup/StepInfo/Policies.tsx:60
msgid "By creating an account you agree to the <0>Terms of Service</0>."
msgstr ""

Resolves #3660.

Also, change the font color of "Having trouble?" to match the font color of the rest of the page.

[haileyok]

Confirmed this works on iOS and web. Thank you for doing this, and sorry we let it sit for so long 🙏