feat: Make observation and timeseries details more similar

.gitignore

VIPSWeb/static/css/vipsweb.css

observations/locale/bg/LC_MESSAGES/django.po

observations/locale/bg/LC_MESSAGES/djangojs.po

observations/locale/bs/LC_MESSAGES/django.po

observations/locale/bs/LC_MESSAGES/djangojs.po

observations/locale/de/LC_MESSAGES/django.po

observations/locale/de/LC_MESSAGES/djangojs.po

observations/locale/fi/LC_MESSAGES/django.po

observations/locale/fi/LC_MESSAGES/djangojs.po

observations/locale/nb/LC_MESSAGES/django.mo

observations/locale/nb/LC_MESSAGES/django.po

observations/locale/nb/LC_MESSAGES/djangojs.po

observations/locale/vi/LC_MESSAGES/django.po

observations/locale/vi/LC_MESSAGES/djangojs.po

observations/locale/zh_Hans/LC_MESSAGES/django.po

observations/locale/zh_Hans/LC_MESSAGES/djangojs.po

observations/templates/observations/detail.html

observations/templates/observations/timeseries.html