Improve leading calculation for images. Tread images as inline-block elements

DEVSIX-1053

Autoported commit.
Original commit hash: [e71ea19]

Author: Snipx

itext.tests/itext.layout.tests/resources/itext/layout/ImageTest/cmp_imageBordersTextTest.pdf

@@ -311,7 +311,7 @@ public override LayoutResult Layout(LayoutContext layoutContext) {
                 }
                 maxAscent = Math.Max(maxAscent, childAscent);
                 // TODO treat images as blocks
-                if (childRenderer is TextRenderer || childRenderer is ImageRenderer) {
+                if (childRenderer is TextRenderer) {
                     maxTextAscent = Math.Max(maxTextAscent, childAscent);
                 }
                 else {
@@ -321,7 +321,7 @@ public override LayoutResult Layout(LayoutContext layoutContext) {
                 }
                 maxDescent = Math.Min(maxDescent, childDescent);
                 // TODO treat images as blocks
-                if (childRenderer is TextRenderer || childRenderer is ImageRenderer) {
+                if (childRenderer is TextRenderer) {
                     maxTextDescent = Math.Min(maxTextDescent, childDescent);
                 }
                 else {

itext.tests/itext.layout.tests/resources/itext/layout/ImageTest/cmp_imageTest02.pdf

@@ -1 +1 @@
-8a3dc5646eacef9df7fe8f01d6836105069f135a
+e71ea191740cc0888a3b63d7b7d8b731fba592dc