tdf#117347 sw form controls: fix disappearing FixedText when editing TextField

This is nominally a regression from commit
af11abf3 (SwViewShell::ImplEndAction:
still paint directly when non-double-buffering, 2015-09-01), but that
just uncovered an already existing problem introduced earlier in commit
2b26c179 (tdf#92577 sw rendercontext:
paint transparent from controls conditionally, 2015-07-06).

Given that the first commit (as a side-effect) solved the problem the
second commit tried to solve, it's safe to just revert this.

(Sadly we have no way to test incremental paints with a reasonable
amount of effort, so no testcase.)

Change-Id: Ia59efbf45a0cd5af3580914e1dcee74d89068f03
Reviewed-on: https://gerrit.libreoffice.org/73647Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins

sw/source/core/view/viewsh.cxx

@@ -430,7 +430,7 @@ void SwViewShell::ImplEndAction( const bool bIdleEnd )
                             DLPostPaint2(true);
                         }
                     }
-                    else
+
                     lcl_PaintTransparentFormControls(*this, aRect); // i#107365
                 }
             }