treeview: cache expander size
authorTimm Bäder <mail@baedert.org>
Tue, 15 Jan 2019 15:23:18 +0000 (16:23 +0100)
committerTimm Bäder <mail@baedert.org>
Wed, 16 Jan 2019 17:58:15 +0000 (18:58 +0100)
commit697aa95c7e6ab2a2110ec0ceed81228c35204494
treeafadaf04a4a21925319aac934f4973bb7be9af86
parenta93f984b1611513481eac5764ba645f2c54f7fd1
treeview: cache expander size

We need to know it all the time and since we get it from CSS, doing that
is fairly expensive.
gtk/gtktreeview.c