Migrate entry styles to "css nodes"

[samdroid-apps]

Upstream, gtk has changed to using "css nodes" [1]. This is a first pass conversion that preserves most of the styles.

[1] https://github.com/GNOME/gtk/commit/bb7d7851ac5cecf960a7ed69af06b2dd0a29484b

Gtk3 version: gtk3-3.19.1-1.fc24.x86_64

Before

After

[i5o]

Reproduced on:

[tamara@tamara-laptop sugar-build]$ lsb_release -a
LSB Version:    :core-4.1-ia32:core-4.1-noarch:cxx-4.1-ia32:cxx-4.1-noarch:desktop-4.1-ia32:desktop-4.1-noarch:languages-4.1-ia32:languages-4.1-noarch:printing-4.1-ia32:printing-4.1-noarch
Distributor ID: Fedora
Description:    Fedora release 24 (Rawhide)
Release:    24
Codename:   Rawhide
[tamara@tamara-laptop sugar-build]$ pkg-config --modversion gtk+-3.0
3.19.1
[tamara@tamara-laptop sugar-build]$ 

[i5o]

The patch works.

Testing on XO-1

[i5o]

Also @samdroid-apps can you change:

.separator {
}

to

separator,
.separator {
}

Without that the separators aren't being showed (due to incorrect name in css) With that they are shown

[i5o]

Doesn't break current support for old versions. will merge after you change that (if you can)

[samdroid-apps]

Ok, just pushed that as another commit, because they are kind of separate. Thanks for finding that though!

[i5o]

Merged