[BUGFIX] Source element within picture element has wrong src attribute

Change it from src to srcset as described in the latest HTML5
specification for master and 6.2

Resolves: #63107
Releases: master, 6.2
Change-Id: Ia3180873af948db30bb60f2f071e5ccfe2283baf
Reviewed-on: http://review.typo3.org/34405


Reviewed-by: Martin Eberle <martin.eberle@gmail.com>
Tested-by: Martin Eberle <martin.eberle@gmail.com>
Reviewed-by: Martin Ficzel <martin.ficzel@gmx.de>
Reviewed-by: Ingo Schmitt <is@marketing-factory.de>
Reviewed-by: Michael Oehlhof <typo3@oehlhof.de>
Tested-by: Michael Oehlhof <typo3@oehlhof.de>
Reviewed-by: Jens Jacobsen <typo3@jens-jacobsen.de>
Tested-by: Jens Jacobsen <typo3@jens-jacobsen.de>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>

typo3/sysext/css_styled_content/static/setup.txt

@@ -681,7 +681,7 @@ tt_content.image.20 {
 			}
 			picture {
 				element = <picture>###SOURCECOLLECTION###<img src="###SRC###"###PARAMS######ALTPARAMS######SELFCLOSINGTAGSLASH###></picture>
-				source = <source src="###SRC###" media="###MEDIAQUERY###"###SELFCLOSINGTAGSLASH###>
+				source = <source srcset="###SRC###" media="###MEDIAQUERY###"###SELFCLOSINGTAGSLASH###>
 			}
 			data {
 				element = <img src="###SRC###"###SOURCECOLLECTION######PARAMS######ALTPARAMS######SELFCLOSINGTAGSLASH###>
@@ -2251,4 +2251,3 @@ plugin.tx_cssstyledcontent._CSS_DEFAULT_STYLE (
 	table.contenttable-color-243 { background-color: {$styles.content.table.backgroundColor.243}; }
 	table.contenttable-color-244 { background-color: {$styles.content.table.backgroundColor.244}; }
 )
-

typo3/sysext/css_styled_content/static/v6.2/setup.txt

@@ -681,7 +681,7 @@ tt_content.image.20 {
 			}
 			picture {
 				element = <picture>###SOURCECOLLECTION###<img src="###SRC###"###PARAMS######ALTPARAMS######SELFCLOSINGTAGSLASH###></picture>
-				source = <source src="###SRC###" media="###MEDIAQUERY###"###SELFCLOSINGTAGSLASH###>
+				source = <source srcset="###SRC###" media="###MEDIAQUERY###"###SELFCLOSINGTAGSLASH###>
 			}
 			data {
 				element = <img src="###SRC###"###SOURCECOLLECTION######PARAMS######ALTPARAMS######SELFCLOSINGTAGSLASH###>
@@ -2246,4 +2246,3 @@ plugin.tx_cssstyledcontent._CSS_DEFAULT_STYLE (
 	table.contenttable-color-243 { background-color: {$styles.content.table.backgroundColor.243}; }
 	table.contenttable-color-244 { background-color: {$styles.content.table.backgroundColor.244}; }
 )
-