Error reporting UI tweaks

Translations/default/menu.xml

@@ -18,6 +18,7 @@
 	<terrasync>Scenery Download</terrasync>
 	<aircraft-center>Aircraft Center (Experimental)</aircraft-center>
 	<exit>Quit</exit>
+	<error-reports>View Errors</error-reports>
 
 	<!-- View menu -->
 	<view>View</view>

Translations/default/sys.xml

@@ -57,7 +57,8 @@
 		<error-category-traffic>Problems occured loading simulated aircaft traffic: some traffic may not appear.</error-category-traffic>
 		<error-category-out-of-memory>Allocating memory failed. Some resources will not be loaded. Adjust your settings to reduce view distance or number of objects loaded.</error-category-out-of-memory>
 		<error-category-multiplayer>Loading a model for another pilot (via multi-player) failed. The other pilot will appear as a default model. (You can disable these errors from the multiplayer settings dialog)</error-category-multiplayer>
-		
+		<error-category-shaders>Problems occurred loading visual effects (shaders). This can cause objects to be invisible or appear incorrect. It can sometimes be fixed by changing rendering settings inside FlightGear, or occasionally, by updating the drivers for your graphics card.</error-category-shaders>
+
 		<error-type-unknown>Unknown error</error-type-unknown>
 		<error-type-not-found>The file or resource was not found</error-type-not-found>
 		<error-type-out-of-memory>Unable to allocate sufficient memory</error-type-out-of-memory>

gui/dialogs/error-report.xml

@@ -86,6 +86,21 @@
 
         <empty><stretch>1</stretch></empty>
 
+		<button>
+            <legend>Next error</legend>
+            <binding>
+				<command>show-error-report</command>
+                <next type="bool">true</next>
+			</binding>
+			 <binding>
+				<command>dialog-update</command>
+			</binding>
+
+			<visible>
+                <property>/sim/error-report/display/have-next</property>
+            </visible>
+        </button>
+
         <button>
             <legend>Close</legend>
             <binding>

gui/menubar.xml

@@ -80,6 +80,13 @@
 			</binding>
 		</item>
 
+		<item>
+			<name>error-reports</name>
+			<binding>
+				<command>show-error-report</command>
+			</binding>
+		</item>
+
 		<item>
 			<name>exit</name>
 			<key>Esc</key>