(css) Improve contacts and messages lists

UI/WebServerResources/scss/components/button/button.scss

@@ -8,8 +8,8 @@
 
 // Buttons for the sidenav folder tree
 // ------------------------------------
-sg-folder-tree .md-button,
-md-sidenav md-list .md-button {
+md-sidenav md-list .md-button,
+.view-list md-list .md-button {
   // dirty fix to squash the theme style
   background-color: transparent !important;
   padding: 0 $mg;
@@ -20,6 +20,11 @@ md-sidenav md-list .md-button {
   -webkit-font-smoothing: auto;
 }
 
+.view-list md-list .md-button {
+  // Gain some space in lists
+  padding: 0;
+}
+
 .md-sidenav-left .md-button [class^="md-icon"] {
   //margin-right: 1em;
 }