HIG compliance for the preference window

data/prefs.ui

@@ -36,18 +36,20 @@
       <object class="GtkGrid">
         <property name="visible">True</property>
         <property name="can_focus">False</property>
-        <property name="margin_start">6</property>
-        <property name="margin_end">6</property>
-        <property name="margin_top">6</property>
-        <property name="margin_bottom">6</property>
+        <property name="margin_start">18</property>
+        <property name="margin_end">18</property>
+        <property name="margin_top">18</property>
+        <property name="margin_bottom">18</property>
         <property name="row_spacing">6</property>
-        <property name="column_spacing">6</property>
+        <property name="column_spacing">12</property>
         <child>
           <object class="GtkLabel">
             <property name="visible">True</property>
             <property name="can_focus">False</property>
-            <property name="label" translatable="yes">Points for a converted try</property>
-            <property name="xalign">0</property>
+            <property name="label" translatable="yes">Points for a _converted try</property>
+            <property name="use_underline">True</property>
+            <property name="mnemonic_widget">try_spin</property>
+            <property name="xalign">1</property>
           </object>
           <packing>
             <property name="left_attach">0</property>
@@ -58,8 +60,10 @@
           <object class="GtkLabel">
             <property name="visible">True</property>
             <property name="can_focus">False</property>
-            <property name="label" translatable="yes">Points for an unconverted try</property>
-            <property name="xalign">0</property>
+            <property name="label" translatable="yes">Points for an _unconverted try</property>
+            <property name="use_underline">True</property>
+            <property name="mnemonic_widget">utry_spin</property>
+            <property name="xalign">1</property>
           </object>
           <packing>
             <property name="left_attach">0</property>
@@ -70,8 +74,10 @@
           <object class="GtkLabel">
             <property name="visible">True</property>
             <property name="can_focus">False</property>
-            <property name="label" translatable="yes">Points for a kick</property>
-            <property name="xalign">0</property>
+            <property name="label" translatable="yes">Points for a _kick</property>
+            <property name="use_underline">True</property>
+            <property name="mnemonic_widget">kick_spin</property>
+            <property name="xalign">1</property>
           </object>
           <packing>
             <property name="left_attach">0</property>