some small changes in translation.

res/values-sl/strings.xml

@@ -253,4 +253,9 @@
     <string name="hint_secretKeys">Poišči zasebne ključe</string>
     <string name="filterInfo">Filter: \"%s\"</string>
 
+    <!-- misc -->
+    <string name="fast">hiter</string>
+    <string name="slow">počasen</string>
+    <string name="very_slow">zelo počasen</string>
+
 </resources>