Displaying the welcome page in SWT mode tested and fine-tuned (issue #710) (#797)

* Minor improvements to the welcome page

* First try to display the YAKINDU logo when SWT-based presentation is used (issue #710).

* Welcome page: styling and logo improved.

* Displaying the welcome page in SWT mode fine-tuned.

* Oops, forgot to delete a file.

plugins/org.yakindu.sct.ui.intro/css/style.properties

@@ -1,4 +1,11 @@
-overview.yakindu-documentation-link.link-icon = img/logo_w032.png
-samples.yakindu-examples-link.link-icon = img/logo_w032.png
-tutorials.yakindu-tutorials-link.link-icon = img/logo_w032.png
-tutorials.yakindu-user-forum-link.link-icon = img/logo_w032.png
+overview.yakindu-documentation-link.link-icon = img/logo_shadowed.png
+overview.yakindu-documentation-link.hover-icon = img/logo_hover.png
+
+samples.yakindu-examples-link.link-icon = img/logo_shadowed.png
+samples.yakindu-examples-link.hover-icon = img/logo_hover.png
+
+tutorials.yakindu-tutorials-link.link-icon = img/logo_shadowed.png
+tutorials.yakindu-tutorials-link.hover-icon = img/logo_hover.png
+
+tutorials.yakindu-user-forum-link.link-icon = img/logo_shadowed.png
+tutorials.yakindu-user-forum-link.hover-icon = img/logo_hover.png

plugins/org.yakindu.sct.ui.intro/yakinduExtensionContent.xml

@@ -28,13 +28,11 @@
 			label="YAKINDU Statechart Tools">
 			<link label="Tutorials" url="http://statecharts.org/documentation/tutorials/"
 				id="yakindu-tutorials-link" style-id="content-link">
-				<text>Read the tutorials …
-				</text>
+				<text>Read the tutorials …</text>
 			</link>
 			<link label="User Group" url="https://groups.google.com/forum/embed/?place=forum/yakindu-user#!forum/yakindu-user"
 				id="yakindu-user-forum-link" style-id="content-link">
-				<text>Visit the SCT user group …
-				</text>
+				<text>Visit the SCT user group …</text>
 			</link>
 		</group>
 	</extensionContent>