Preferences: Sync default for 'tile-multiplier' with master

A default of 16 should yield better user experience.

src/display/sp-canvas.cpp

@@ -1770,7 +1770,7 @@ bool SPCanvas::paintRect(int xx0, int yy0, int xx1, int yy1)
     static unsigned tile_multiplier = 0;
     if (tile_multiplier == 0) {
         Inkscape::Preferences *prefs = Inkscape::Preferences::get();
-        tile_multiplier = prefs->getIntLimited("/options/rendering/tile-multiplier", 1, 1, 64);
+        tile_multiplier = prefs->getIntLimited("/options/rendering/tile-multiplier", 16, 1, 512);
     }
 
     if (_rendermode != Inkscape::RENDERMODE_OUTLINE) {

src/ui/dialog/inkscape-preferences.cpp

@@ -1446,7 +1446,7 @@ void InkscapePreferences::initPageRendering()
     _page_rendering.add_line( false, _("Rendering _cache size:"), _rendering_cache_size, C_("mebibyte (2^20 bytes) abbreviation","MiB"), _("Set the amount of memory per document which can be used to store rendered parts of the drawing for later reuse; set to zero to disable caching"), false);
 
     // rendering tile multiplier
-    _rendering_tile_multiplier.init("/options/rendering/tile-multiplier", 1.0, 64.0, 1.0, 4.0, 1.0, true, false);
+    _rendering_tile_multiplier.init("/options/rendering/tile-multiplier", 1.0, 512.0, 1.0, 16.0, 16.0, true, false);
     _page_rendering.add_line( false, _("Rendering tile multiplier:"), _rendering_tile_multiplier, _("requires restart"), _("Set the relative size of tiles used to render the canvas. The larger the value, the bigger the tile size."), false);
 
     /* blur quality */