GUAC-1245: OSK Super and Menu keys are stuck together. Remove 'super' modifier on Meny key so that these work independently and the context menu can be accessed from the Menu key

guacamole/src/main/webapp/app/osk/styles/osk.css

@@ -116,8 +116,7 @@
 .guac-keyboard.guac-keyboard-modifier-caps .guac-keyboard-key-caps,
 
 /* Active super */
-.guac-keyboard.guac-keyboard-modifier-super .guac-keyboard-key-super,
-.guac-keyboard.guac-keyboard-modifier-super .guac-keyboard-key-menu {
+.guac-keyboard.guac-keyboard-modifier-super .guac-keyboard-key-super {
     background: #882;
     border-color: #DD4;
 }

guacamole/src/main/webapp/layouts/en-us-qwerty.json

@@ -50,7 +50,6 @@
 
         "Menu" : [{
             "title"    : "Menu",
-            "modifier" : "super",
             "keysym"   : 65383
         }],
         "LShift" : [{

guacamole/src/main/webapp/layouts/fr-fr-azerty.json

@@ -50,7 +50,6 @@
 
         "Menu" : [{
             "title"    : "Menu",
-            "modifier" : "super",
             "keysym"   : 65383
         }],
         "LShift" : [{

guacamole/src/main/webapp/layouts/ru-ru-qwerty.json

@@ -50,7 +50,6 @@
 
         "Menu" : [{
             "title"    : "Menu",
-            "modifier" : "super",
             "keysym"   : 65383
         }],
         "LShift" : [{