GUAC-919: Restore button styling.

guacamole/src/main/webapp/app/login/styles/login.css

@@ -128,6 +128,7 @@ div.login-dialog h1 {
 div.login-dialog .buttons {
     padding-top: 0.5em;
     text-align: right;
+    margin: 0;
 }
 
 input[type="submit"].login, button.login {

guacamole/src/main/webapp/styles/ui.css

@@ -33,10 +33,6 @@ input[type=checkbox], input[type=number], input[type=text], input[type=radio], l
     -webkit-tap-highlight-color: rgba(128,192,128,0.5);
 }
 
-input[type=submit], button, a.button {
-    -webkit-appearance: none;
-}
-
 div.location, input[type=text], input[type=number], input[type=password], textarea {
     border: 1px solid #777;
     -moz-border-radius: 0.2em;
@@ -61,6 +57,7 @@ textarea {
 
 input[type="submit"], button, a.button {
     
+    -webkit-appearance: none;
     text-decoration: none;
 
     background-color: #3C3C3C;
@@ -113,6 +110,10 @@ button.danger:active, a.button.danger:active {
     background: #932;
 }
 
+a.button {
+    display: inline-block;
+}
+
 body {
     background: #EEE;
     font-family: FreeSans, Helvetica, Arial, sans-serif;
@@ -588,14 +589,21 @@ div.logout-panel {
     margin: 1em;
 }
 
-button.logout, a.button {
-
-    background-image: url('images/action-icons/guac-logout.png');
+.button.logout, .button.manage, .button.back {
     background-repeat: no-repeat;
     background-size: 1em;
     background-position: 0.5em 0.45em;
-
     padding-left: 1.8em;
-
 }
 
+.button.logout {
+    background-image: url('images/action-icons/guac-logout.png');
+}
+
+.button.manage {
+    background-image: url('images/action-icons/guac-config.png');
+}
+
+.button.back {
+    background-image: url('images/action-icons/guac-back.png');
+}