HistoryView: Resize the detail webview

This view was one pixel too big, causing weird scrolling behaviour when
selecting text.

This fixes #128: Automatic scrolling when highlighting any text

PBGitHistoryView.xib

@@ -357,7 +357,7 @@
 															<string>public.url-name</string>
 														</object>
 													</object>
-													<string key="NSFrame">{{1, 0}, {851, 1}}</string>
+													<string key="NSFrame">{{1, 0}, {851, 186}}</string>
 													<reference key="NSSuperview" ref="859052736"/>
 													<reference key="NSNextKeyView"/>
 													<string key="FrameName"/>
@@ -384,7 +384,8 @@
 													<bool key="AllowsUndo">YES</bool>
 												</object>
 											</object>
-											<string key="NSFrameSize">{852, 0}</string>
+											<string key="NSFrameSize">{852, 186}</string>
+											<reference key="NSSuperview" ref="135073984"/>
 										</object>
 										<string key="NSLabel">Details</string>
 										<object class="NSColor" key="NSColor" id="457244339">
@@ -2975,7 +2976,7 @@
 					</object>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
-					<string>{{189, 79}, {852, 432}}</string>
+					<string>{{321, 79}, {852, 432}}</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>
 					<string>com.apple.InterfaceBuilder.CocoaPlugin</string>