Bug 1072302: Catch exception when newsletter name is invalid.

Instead treat as normal form error.
Add Uruguay avail to Alcatel OTF C. Bug 1071766.

- Clean up/correct other device Uruguay availability.
Merge pull request #2310 from pmclanahan/catch-newsletter-error-1072302

Bug 1072302: Catch exception when newsletter name is invalid.
Merge pull request #2318 from jpetto/bug-1071766-fxos-movistar-uruguay

Add Uruguay avail to Alcatel OTF C. Bug 1071766.
Fix Bug 1064645 - [traceback] UndefinedError: list object has no element 0 on https://www-dev.allizom.org/ta/privacy/
Fix Bug 941248 - Remove known issues in-page link from release notes sidebar if there are no issues
Merge pull request #2320 from kyoshino/bug-941248-relnotes-issues-link

Fix Bug 941248 - Remove known issues in-page link from release notes sidebar if there are no issues
Merge pull request #2269 from kyoshino/bug-1064645-privacy-error

Fix Bug 1064645 - [traceback] UndefinedError: list object has no element 0 on https://www-dev.allizom.org/ta/privacy/