i18n - Missing Spanish translation strings: page.about.*

[dzc34]

Missing Spanish translation strings
on this following URL: https://app.contrast-finder.org/about.html?lang=es

i18n file:
/webapp/src/main/resources/i18n/contrast-finder_utf8_es.properties (between line 78 and line 102)

# page.result-error.titleTag=Error
# page.about.titleTag=About Contrast-Finder
# page.about.title=About <em lang="en">Contrast-Finder</em>
# page.about.links=You will find more information in english on the project website:(...)
# page.about.fileList.title=Additional files
# page.about.build.title=Build info
# page.about.build.version=version:
# page.about.build.gitBranch=git branch:
# page.about.build.gitCommit=git commit:
# page.about.build.build=Build:
# page.about.build.date=date:
# page.about.build.id=ID:
# page.about.build.platform=Platform:
# page.about.availableLanguages=Available languages

[dzc34]

ping @davidjr82, if you have some time ?

[davidjr82]

PR in #247
Updated also some old strings.

[dzc34]

PR merged.
Thanks again for your help.