[Luminance HDR]: use of png icons instead of svgs ones (this fix prob…

…lems in Windows and some UI themes in Linux)

icons.qrc

@@ -11,32 +11,32 @@
         <file alias="scale">program-icons/scale.png</file>
         <file alias="soft-proofing">program-icons/soft-proofing.png</file>
         <file alias="tonemap">program-icons/tonemap.png</file>
-        <file alias="adjust-levels">program-icons/adjust-levels.svg</file>
+        <file alias="adjust-levels">program-icons/adjust-levels.png</file>
         <file alias="video-television">program-icons/video-television.png</file>
         <file alias="camera-photo">program-icons/camera-photo.png</file>
         <file alias="printer">program-icons/printer.png</file>
         <file alias="go-next">program-icons/go-next.png</file>
         <file alias="go-previous">program-icons/go-previous.png</file>
         <file alias="downarrow">program-icons/downarrow.png</file>
         <file alias="uparrow">program-icons/uparrow.png</file>
-        <file alias="whitebalance">program-icons/whitebalance.svg</file>
+        <file alias="whitebalance">program-icons/whitebalance.png</file>
         <file alias="document-save-all">program-icons/document-save-all.png</file>
         <file alias="zoom">program-icons/zoom.png</file>
         <file alias="edit-download">program-icons/edit-download.png</file>
         <file alias="cloud-upload">program-icons/cloud-upload.png</file>
         <file alias="upload-media">program-icons/upload-media.png</file>
-        <file alias="chronometer-reset">program-icons/chronometer-reset.svg</file>
+        <file alias="chronometer-reset">program-icons/chronometer-reset.png</file>
         <file alias="document-preview">program-icons/document-preview.png</file>
-        <file alias="preferences-system-windows">program-icons/preferences-system-windows.svg</file>
-        <file alias="color-management">program-icons/color-management.svg</file>
+        <file alias="preferences-system-windows">program-icons/preferences-system-windows.png</file>
+        <file alias="color-management">program-icons/color-management.png</file>
         <file alias="transform-crop">program-icons/transform-crop.png</file>
         <file alias="transform-crop-and-resize">program-icons/transform-crop-and-resize.png</file>
         <file alias="dialog-ok-apply">program-icons/dialog-ok-apply.png</file>
         <file alias="edit-select-none">program-icons/edit-select-none.png</file>
         <file alias="globe">program-icons/globe.png</file>
         <file alias="selection-move-to-layer-below">program-icons/selection-move-to-layer-below.png</file>
         <file alias="draw-brush">program-icons/draw-brush.png</file>
-        <file alias="edit-select-lasso">program-icons/edit-select-lasso.svg</file>
+        <file alias="edit-select-lasso">program-icons/edit-select-lasso.png</file>
         <file alias="help-whatsthis">program-icons/help-whatsthis.png</file>
         <file alias="arrow-up">program-icons/arrow-up.png</file>
         <file alias="arrow-down">program-icons/arrow-down.png</file>