Manually disable IP version when creating network subnets.

In some configuration, IPv6 is not supported. This patch provides
a way to disable IPv6 by hiding the ip version drop down menu and
setting the initial value to IPv4.

Closes-bug: 1352404

Change-Id: I950a1e19d509fdf4816816dd7b0f05bd418e7147
Removing border from overview charts

There will be thin axes instead of the border.

Change-Id: I82b588a0a925d733c1c0de496fa359989725e0f2
Fix background highlight for dropdown

Now when we hover mouse over them they are highlighted.
Dropdown "More" in /project/instances/

Closes-Bug: #1356958
Change-Id: Ic3e745e3ef43ba6316124b04c8d055d02a25e63a
Set self.kwargs in horizon.tables.actions.LinkAction

Set self.kwargs during __init__ so that get_link_url no longer raises
an AttributeError at "return self.url(datum, **self.kwargs)".

Change-Id: I97aeab781ee1945c3028590be0a6a046c7fcd9b9
Closes-Bug: 1290909
reduce the height of the textarea to 4

Textarea of height 10 lines seems large considering the usecases
in Horizon for forms containing multiple fields. Reducing it to a
lesser value for subnet workflows in networks and images forms.

Change-Id: I99dc6f735ed446ff4005aac7a981461c236f65b9
Closes-Bug: 1358856
Merge "Set self.kwargs in horizon.tables.actions.LinkAction"
Merge "Removing border from overview charts"
Merge "Manually disable IP version when creating network subnets."
Merge "Fix background highlight for dropdown"
Merge "reduce the height of the textarea to 4"