Fix footnotes in table with RevTeX4

These classes come with their own working implementation of table
footnotes, so we are not supposed to use the tablefootnote or
footnote package.

Also add missing outliner name.

(cherry picked from commit dfaa4e9466)

lib/layouts/revtex4-1.layout

@@ -23,6 +23,9 @@ Input numrevtex.inc
 
 Provides natbib-internal	1
 Provides url			1
+Provides tablefootnote          1
+Provides footnote-alternative   1
+
 SecNumDepth			4
 TocDepth			3
 DefaultStyle		Standard
@@ -286,6 +289,9 @@ Float
 End
 
 
+OutlinerName video        "Videos"
+
+
 InsetLayout Flex:Float_Link
 	CopyStyle		Flex:URL
 	LabelString		"Float link"
@@ -349,6 +355,12 @@ InsetLayout Flex:Surname
 End
 
 
+# RevTeX uses normal footnotes in tables
+InsetLayout Foot:InFloatTable
+	CopyStyle             Foot
+End
+
+
 NoStyle Chapter
 NoStyle Chapter*
 NoStyle LyX-Code

lib/layouts/revtex4.layout

@@ -16,8 +16,11 @@ Format 65
 Columns                   1
 Sides                     1
 PageStyle                 Headers
+
 Provides natbib-internal  1
 Provides url              1
+Provides tablefootnote    1
+Provides footnote-alternative 1
 
 SecNumDepth               4
 TocDepth                  3
@@ -277,5 +280,11 @@ Style Keywords
 End
 
 
+# RevTeX uses normal footnotes in tables
+InsetLayout Foot:InFloatTable
+	CopyStyle             Foot
+End
+
+
 Input stdfloats.inc
 Input stdcounters.inc

src/insets/InsetFoot.cpp

@@ -118,7 +118,10 @@ int InsetFoot::docbook(odocstream & os, OutputParams const & runparams) const
 
 void InsetFoot::validate(LaTeXFeatures & features) const
 {
-	if (!features.saveNoteEnv().empty()) {
+	// Use footnote package to provide footnotes in tables
+	// unless an alternative approach is built in the class.
+	if (!features.saveNoteEnv().empty()
+	    && !features.isProvided("footnote-alternative")) {
 		features.require("footnote");
 		features.addPreambleSnippet(
 			from_ascii("\\makesavenoteenv{"