GUI: Improve calculation for savegame thumbnail labels

Instead of shrinking the rect based on how many labels aren't there,
expand the rect based on how many labels are there.

Closes gh-958

gui/saveload-dialog.cpp

@@ -474,14 +474,14 @@ void SaveLoadChooserSimple::reflowLayout() {
 		int thumbY = y + kLineHeight;
 
 		int textLines = 0;
-		if (!_saveDateSupport)
+		if (_saveDateSupport)
 			textLines += 2;
-		if (!_playTimeSupport)
+		if (_playTimeSupport)
 			textLines++;
-		if (_saveDateSupport || _playTimeSupport)
+		if (textLines > 0)
-			textLines--; // add a line of padding at the bottom
+			textLines++; // add a line of padding at the bottom
 
-		_container->resize(x, y, w, h - (kLineHeight * textLines));
+		_container->resize(x, y, w, h + (kLineHeight * textLines));
 		_gfxWidget->resize(thumbX, thumbY, thumbW, thumbH);
 
 		int height = thumbY + thumbH + kLineHeight;

gui/themes/default.inc

@@ -1829,7 +1829,7 @@ const char *defaultXML1 = "<?xml version = '1.0'?>"
 "<widget name='List' />"
 "<widget name='Thumbnail' "
 "width='180' "
-"height='200' "
+"height='155' "
 "/>"
 "</layout>"
 "<layout type='horizontal' padding='0,0,0,0'>"

gui/themes/scummclassic/classic_layout.stx

@@ -1285,7 +1285,7 @@
 				<widget name = 'List' />
 				<widget name = 'Thumbnail'
 						width = '180'
-						height = '200'
+						height = '155'
 				/>
 			</layout>
 			<layout type = 'horizontal' padding = '0, 0, 0, 0'>

gui/themes/scummmodern/scummmodern_layout.stx

@@ -1299,7 +1299,7 @@
 				<widget name = 'List' />
 				<widget name = 'Thumbnail'
 						width = '180'
-						height = '200'
+						height = '155'
 				/>
 			</layout>
 			<layout type = 'horizontal' padding = '0, 0, 0, 0'>