- fixed gettext usage with .format() only for original text with %s
- fixed typos
- fixed translation yes/no buttons in the dialog.
- improved translating sentences without "connecting" words (eg. see web/pgadmin/dashboard/static/js/dashboard.js,
word 'cancel' needs to be translated in the Czech language as 'zrušit' but in another sentence as 'zrušení')
- added gettext for text translations.
1) Fixed usage gettext('') instead of _('') in javascript files.
2) Fixed usage gettext('') instead of `${gettext('')}` in javascript files,
because "pybabel extract" not support extracting from this syntax.