Added keyboard shortcuts to trace link creation view

The problem regarding Backspace and Delete keys in Mac and other
platforms are considered. For unknown reasons, adding sequenceModifier
disabled the previous key shortcut 'Shift+c' for creation of tracelink.
I replaced tracelink creation shortcut with'shift+1'.

Change-Id: Idb6aefe3f64e98ef5e2b669f7bdd7634af78664b
Signed-off-by: SINA ENTEKHABI <sinae@chalmers.se>
diff --git a/org.eclipse.capra.ui/plugin.xml b/org.eclipse.capra.ui/plugin.xml
index b08e342..41221eb 100644
--- a/org.eclipse.capra.ui/plugin.xml
+++ b/org.eclipse.capra.ui/plugin.xml
@@ -136,4 +136,36 @@
             name="%page.name">
       </page>
    </extension>
+   <extension
+         point="org.eclipse.ui.bindings">
+      <key
+            commandId="org.eclipse.capra.generic.tracecreation.commands.createTrace"
+            schemeId="org.eclipse.ui.defaultAcceleratorConfiguration"
+            sequence="M2+1">
+      </key>
+   </extension>
+   <extension
+         point="org.eclipse.ui.bindings">
+  	  <sequenceModifier
+  			find="DEL"
+  			replace="BS"
+  			platforms="cocoa"/>
+      <key
+            commandId="org.eclipse.capra.generic.tracecreation.commands.removefromselection"
+            schemeId="org.eclipse.ui.defaultAcceleratorConfiguration"
+            sequence="DEL">
+      </key>
+   </extension>
+   <extension
+         point="org.eclipse.ui.bindings">
+  	  <sequenceModifier
+  			find="M2+DEL"
+  			replace="M2+BS"
+  			platforms="cocoa"/>
+         <key
+            commandId="org.eclipse.capra.generic.tracecreation.clearselection"
+            schemeId="org.eclipse.ui.defaultAcceleratorConfiguration"
+            sequence="M2+DEL">
+      </key> 
+	</extension>
 </plugin>