client: translations: improve Makefile * Change target `translations` to only be remade if one of the `*.po` files changes. Technically is only directly depends on these files. This looks like a defect in the original upstream Makefile logic. * Add found `*.js` files to the dependencies of the `pot` target, because they are used when creating it. This looks like it was missed when adding the Makefile initially with 0fd572582ab8.

root = true

[*]
indent_style = space
indent_size = 2
charset = utf-8
trim_trailing_whitespace = true
insert_final_newline = true
end_of_line = lf
# editorconfig-tools is unable to ignore longs strings or urls
max_line_length = null