Change: (defface ement-room-list-direct, -name) :underline nil

In some themes, faces these inherit from may have unwanted
attributes (e.g. :underline for button).

README.org

@@ -303,6 +303,10 @@ Ement.el doesn't support encrypted rooms natively, but it can be used transparen
 
 + Customization groups for faces.  (Thanks to [[https://github.com/phil-s][Phil Sainty]].)
 
+*Changes*
+
++ Disable underline for faces ~ement-room-list-direct~ and ~ement-room-list-name~ (in case a face they inherit from enables it, e.g. when themed).
+
 ** 0.16
 
 *Compatibility*

ement-room-list.el

@@ -146,6 +146,9 @@ Set automatically when `ement-room-list-mode' is activated.")
 
 ;;;;; Faces
 
+;; TODO: Inherit from a single face to allow certain attributes to be disabled
+;; (e.g. underline), in case a face inherited from has such attributes.
+
 (defface ement-room-list-direct
   ;; We want to use `font-lock-constant-face' as the base face (because it seems to look
   ;; nice with most themes), but that face sometimes is defined as bold, which interferes
@@ -156,7 +159,7 @@ Set automatically when `ement-room-list-mode' is activated.")
   (progn
     (copy-face 'font-lock-constant-face 'ement--font-lock-constant-face)
     (set-face-attribute 'ement--font-lock-constant-face nil :weight 'unspecified)
-    '((t (:inherit (ement--font-lock-constant-face ement-room-list-name)))))
+    '((t (:inherit (ement--font-lock-constant-face ement-room-list-name) :underline nil))))
   "Direct rooms."
   :group 'ement-room-list-faces)
 
@@ -179,7 +182,7 @@ Set automatically when `ement-room-list-mode' is activated.")
   :group 'ement-room-list-faces)
 
 (defface ement-room-list-name
-  '((t (:inherit (font-lock-function-name-face button))))
+  '((t (:inherit (font-lock-function-name-face button) :underline nil)))
   "Non-direct rooms."
   :group 'ement-room-list-faces)