Merge branch 'compact-files-list' into 'master'

Make files list more compact by reducing row height from 47px to 44px

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

cc @jschatz1 @skyruler 

See merge request !4007

app/assets/stylesheets/pages/tree.scss

@@ -16,7 +16,7 @@
     tr {
       > td, > th {
-        line-height: 26px;
+        line-height: 23px;
       }
       &:hover {