[LyX/master] Simplify the code that sets the read-only emblem in status bar

[Jean-Marc Lasgouttes]

commit 7cbc0c16a841716fa8966e0f800ee2cdc0432e25
Author: Jean-Marc Lasgouttes <lasgout...@lyx.org>
Date:   Fri Sep 23 11:17:20 2016 +0200

    Simplify the code that sets the read-only emblem in status bar
    
    Actually QIcon is able to handle transparently the svg icons.
    
    Patch from Enrico.
---
 src/frontends/qt4/GuiView.cpp |   12 +-----------
 1 files changed, 1 insertions(+), 11 deletions(-)

diff --git a/src/frontends/qt4/GuiView.cpp b/src/frontends/qt4/GuiView.cpp
index 10ec74e..fdc05a9 100644
--- a/src/frontends/qt4/GuiView.cpp
+++ b/src/frontends/qt4/GuiView.cpp
@@ -578,17 +578,7 @@ GuiView::GuiView(int id)
        QFontMetrics const fm(statusBar()->fontMetrics());
        int const roheight = max(int(d.normalIconSize), fm.height());
        QSize const rosize(roheight, roheight);
-       QPixmap readonly = QPixmap(rosize);
-       QString imagedir = "images/";
-       FileName fname = imageLibFileSearch(imagedir, "emblem-readonly", 
"svgz");
-       QSvgRenderer renderer(toqstr(fname.absFileName()));
-       if (renderer.isValid()) {
-               
readonly.fill(statusBar()->palette().color(QWidget::backgroundRole()));
-               QPainter painter(&readonly);
-               renderer.render(&painter);
-       } else {
-               readonly = getPixmap("images/", "emblem-readonly", 
"png").scaled(rosize, Qt::KeepAspectRatio);
-       }
+       QPixmap readonly = QIcon(getPixmap("images/", "emblem-readonly", 
"svgz,png")).pixmap(rosize);
        read_only_ = new QLabel(statusBar());
        read_only_->setPixmap(readonly);
        read_only_->setScaledContents(true);