Slightly improve search widget in several areas, mostly look and feel. Nothing fancy, just light touches here and there.
* СSS:
* Increase font size (11px → 13px)
* Use pixels for paddings
* Always outline search input field on focus
* i18n: use capitalized notation for search text
* Remove empty label
Not perfect, but fixes Goldmark and respect blackfriday simultaneously
(looks slightly different now).
Note that the `markup.tableOfContents.ordered` parameter is not
supported.
Closes#243
* Add .Site.Params.googleFontsLink
* Add .Site.Params.style.vars.fontFamilyPrimary
* Add .Site.Params.style.vars.fontFamilySecondary
To store all style related parameters in one place:
* Deprecate .Site.Params.highlightColor
* Add .Site.Params.style.vars.highlightColor
Closes#150Closes#155Closes#225
* .Site.Params.post_navigation → .Site.Params.pager
This change requires manual intervention if you
already use Mainroad and `post_navigation` config
param. In this case, rename your `post_navigation`
config param to `pager`.
