[DOC] some documentation for users

src/Gargantext/Components/App.purs

@@ -173,8 +173,8 @@ topBarCpt = R.hooksComponent "G.C.A.topBar" cpt
             , H.div { className: "collapse navbar-collapse" }
                     [ H.ul { className: "nav navbar-nav" } [divDropdownLeft]
                     , H.ul { title: "If you are Left Handed you can change "
-                                  <> "the interface by clicking on me. Click "
-                                  <> "again to come back to previous state."
+                                  <> "the interface by clicking on me.\n"
+                                  <> "Click to come back to previous state."
                            , className: "nav navbar-nav"
                            } [handedChooser { handed }]
                     {-, H.ul { title: "Dark Mode soon here"

src/Gargantext/Components/Forest/Tree/Node.purs

@@ -140,7 +140,10 @@ nodeMainSpan p@{ dispatch, folderOpen, frontends, handed, session } = R.createEl
         H.i {className: GT.fldr nodeType open} []
         ]
 
-    popOverIcon = H.a { className: "settings fa fa-cog" } []
+    popOverIcon = H.a { className: "settings fa fa-cog" 
+                      , title : "Each node of the Tree can perform some actions.\n"
+                             <> "Click here to execute one of them."
+                      } []
 
     mNodePopupView props@{id, nodeType} onPopoverClose =
       nodePopupView { id