Navigation: Unified cloud navigation

* Removed main drop down menu
* Added "My cloud" to user menu
* Attract/Flamenco is found under Production Tools menu
* Attract/Flamenco has the same navigation as its project

src/templates/menus/_dropdown_main.pug

@@ -1,38 +0,0 @@
-| {% import '_macros/_navigation.html' as navigation %}
-
-include ../../../../pillar/src/templates/mixins/components
-
-ul.dropdown-menu.nav-main
-	+nav-secondary()(
-		class="nav-secondary-vertical float- bg-light border-left rounded-left")
-		| {{ navigation.dropdown_main_root(title) }}
-
-	.dropdown-menu-tab(data-dropdown-tab='home')
-		.dropdown-menu-column
-			+nav-secondary()(
-				class="nav-secondary-vertical rounded-right border-left overflow-hidden")
-				| {{ navigation.dropdown_main_home(title) }}
-
-	.dropdown-menu-tab(data-dropdown-tab='open-projects')
-		.dropdown-menu-column
-			+nav-secondary()(
-				class="nav-secondary-vertical rounded-right border-left overflow-hidden")
-				| {{ navigation.dropdown_main_open_projects(title) }}
-
-	.dropdown-menu-tab(data-dropdown-tab='learn')
-		.dropdown-menu-column
-			+nav-secondary()(
-				class="nav-secondary-vertical rounded-right border-left overflow-hidden")
-				| {{ navigation.dropdown_main_learn(title) }}
-
-	.dropdown-menu-tab(data-dropdown-tab='libraries')
-		.dropdown-menu-column
-			+nav-secondary()(
-				class="nav-secondary-vertical rounded-right border-left overflow-hidden")
-				| {{ navigation.dropdown_main_libraries(title) }}
-
-	.dropdown-menu-tab(data-dropdown-tab='services')
-		.dropdown-menu-column
-			+nav-secondary()(
-				class="nav-secondary-vertical rounded-right border-left overflow-hidden")
-				| {{ navigation.dropdown_main_services(title) }}