Added a few Capitalizations (And one hidden smily :)

Literally says it all :)

static/index.html

@@ -1203,7 +1203,7 @@
               </div>
               <div
                 id="restartTestButton"
-                aria-label="Restart test"
+                aria-label="Restart Test"
                 data-balloon-pos="down"
                 class=""
                 tabindex="0"
@@ -1351,7 +1351,7 @@
                 </div>
                 <div
                   id="restartTestButtonWithSameWordset"
-                  aria-label="Repeat test"
+                  aria-label="Repeat Test"
                   data-balloon-pos="down"
                   tabindex="0"
                   onclick="this.blur();"
@@ -1420,7 +1420,7 @@
                 ) to restart the typing test. Open the command line by pressing
                 <key>esc</key>
                 - there you can access all the functionality you need without
-                touching your mouse.
+                touching your mouse :)
               </p>
             </div>
             <div class="section">
@@ -3650,10 +3650,10 @@
             <key>tab</key>
             and
             <key>enter</key>
-            - restart test
+            - Restart Test
             <br />
             <key>esc</key>
-            - command line
+            - Command Line
           </div>
           <div class="leftright">
             <div class="left">