Fix multiline tabs drawing of first / last tab

Use is{Left,Right}Aligned instead of is{First,Last}. In multi-line
tabs, not only first/last item needs to be drawn differently, but
also some middle, which is now the first in the new line now.

Change-Id: I81ddde192eca794f16df98d629f47991c59732c7
Reviewed-on: https://gerrit.libreoffice.org/68945
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>

vcl/source/gdi/WidgetDefinition.cxx

@@ -75,11 +75,12 @@ WidgetDefinitionPart::getStates(ControlType eType, ControlState eState,
 
             auto const& rTabItemValue = static_cast<TabitemValue const&>(rValue);
 
-            if (rTabItemValue.isFirst() && rTabItemValue.isLast())
+            if (rTabItemValue.isLeftAligned() && rTabItemValue.isRightAligned()
+                && rTabItemValue.isFirst() && rTabItemValue.isLast())
                 sExtra = "first_last";
-            else if (rTabItemValue.isFirst())
+            else if (rTabItemValue.isLeftAligned() || rTabItemValue.isFirst())
                 sExtra = "first";
-            else if (rTabItemValue.isLast())
+            else if (rTabItemValue.isRightAligned() || rTabItemValue.isLast())
                 sExtra = "last";
             else
                 sExtra = "middle";