UI / UX work to polish some features not in current layouts

[anmipa]

Assigned to me for now.

[anmipa]

Relates (at least) to
#158 #157 #137 #105 #84 #82 #77 #54 #52 (major) #50 (major) #46 #42

[anmipa]

Also quite a lot general design choices. Example: should service name be bigger in second nav. Benchmark: https://kerrokantasi.hel.fi/

[anmipa]

Include to this issue: mobile view.

[anmipa]

Include to this issue: download data needs more user guidance. Yle Tunnus is a good benchmark.

[anmipa]

Reminder: should "About page" be a link in nav? Now we'll add this to footer.

[anmipa]

Frontpage: should login button be more visible (blue / just bigger).

[anmipa]

Some design choices to do with content: Suomi vai suomeksi, Svenska eller På svenska.

We should keep the language conventions.

[anmipa]

Relates to #170

[anmipa]

We might want to turn visuals a bit down in Landing page.

[anmipa]

General pixel checking needed in just about every page.

[anmipa]

404 pages

[janimattiellonen]

About link points to a non-existing page

[janimattiellonen]

Also, what's the difference between "Tietoa palvelusta" and "Mikä Oma.helsinki?" links?

[janimattiellonen]

If we use Suomeksi, På svenska, In english, then those changes should probably be made to all maintained sites (https://kerrokantasi.hel.fi, https://omastadi.hel.fi etc seems to use same format)

[janimattiellonen]

I noticed that the different sites use different icons for login and language selection. Should they use the same icons?

[anmipa]

Possibly relates to https://sketch.cloud/s/AJ1Jr