GUI: Add DropdownButtonWidget and use it in the launcher for mass add

DropdownButtonWidget is a button split in two parts vertically. Clicking
the left part triggers a default action. Clicking the right part shows a
list of other actions the user can choose from.

Using this widget on the launcher lets 'Mass add' be a secondary action
of the 'Add' button, removing the necessity of pressing the shift key to
access the feature.

1 files changed, 2 insertions, 2 deletions

diff --git a/graphics/VectorRendererSpec.cpp b/graphics/VectorRendererSpec.cpp
index 457e9ff149..a1d8ba3599 100644
--- a/graphics/VectorRendererSpec.cpp
+++ b/graphics/VectorRendererSpec.cpp
@@ -670,9 +670,9 @@ gradientFillClip(PixelType *ptr, int width, int x, int y, int realX, int realY)
 	if (grad == 0 ||
 		_gradCache[curGrad] == _gradCache[curGrad + 1] || // no color change
 		stripSize < 2) { // the stip is small
-		colorFill<PixelType>(ptr, ptr + width, _gradCache[curGrad]);
+		colorFillClip<PixelType>(ptr, ptr + width, _gradCache[curGrad], realX, realY, _clippingArea);
 	} else if (grad == 3 && ox) {
-		colorFill<PixelType>(ptr, ptr + width, _gradCache[curGrad + 1]);
+		colorFillClip<PixelType>(ptr, ptr + width, _gradCache[curGrad + 1], realX, realY, _clippingArea);
 	} else {
 		for (int j = x; j < x + width; j++, ptr++) {
 			if (realX + j - x < _clippingArea.left || realX + j - x >= _clippingArea.right) continue;