Make fill and magic wand default to unlimited size

Since the last commit optimized that case and spills are no longer an
issue due to the ability to preview. Selections also provide a better
kind of size limiter than the size limit rectangle did. To make even
existing users default to unlimited size, the setting key changed from
"size" to "limit".

src/desktop/toolwidgets/fillsettings.cpp

@@ -32,7 +32,7 @@ static const ToolProperties::RangedValue<int> expand{
 	blendMode{
 		QStringLiteral("blendMode"), DP_BLEND_MODE_NORMAL, 0,
 		DP_BLEND_MODE_MAX},
-	size{QStringLiteral("size"), 500, 10, 5000},
+	size{QStringLiteral("limit"), 5000, 10, 5000},
 	opacity{QStringLiteral("opacity"), 100, 1, 100},
 	gap{QStringLiteral("gap"), 0, 0, 32},
 	source{QStringLiteral("source"), 2, 0, 3},

src/desktop/toolwidgets/selectionsettings.cpp

@@ -28,7 +28,7 @@ static const ToolProperties::Value<bool> antialias{
 static const ToolProperties::RangedValue<int> expand{
 	QStringLiteral("expand"), 0, 0, 100},
 	featherRadius{QStringLiteral("featherRadius"), 0, 0, 40},
-	size{QStringLiteral("size"), 5000, 10, 5000},
+	size{QStringLiteral("limit"), 5000, 10, 5000},
 	opacity{QStringLiteral("opacity"), 100, 1, 100},
 	gap{QStringLiteral("gap"), 0, 0, 32},
 	source{QStringLiteral("source"), 2, 0, 2},