UI improvements

* Implement visibility choice on board creation;

* Rework the board header bar. Remove links to un-implemented
features;

* Implement a board star counter (visible if the board have >2 stars);

* Define a new icon (a thin cross) to close elements;

* Remove $(document).on('mouseover') event handlers that were
basically fired hundreds of times for nothing, we now define a proper
Tracker dependency to execute jquery-ui plugin initialization only
when something has changed;

* Bug fixes related to list scrolling.

client/components/boards/boardHeader.js

@@ -0,0 +1,157 @@
+Template.boardMenuPopup.events({
+  'click .js-rename-board': Popup.open('boardChangeTitle'),
+  'click .js-change-board-color': Popup.open('boardChangeColor')
+});
+
+Template.boardChangeTitlePopup.events({
+  submit: function(evt, t) {
+    var title = t.$('.js-board-name').val().trim();
+    if (title) {
+      Boards.update(this._id, {
+        $set: {
+          title: title
+        }
+      });
+      Popup.close();
+    }
+    evt.preventDefault();
+  }
+});
+
+BlazeComponent.extendComponent({
+  template: function() {
+    return 'headerBoard';
+  },
+
+  isStarred: function() {
+    var boardId = this.currentData()._id;
+    var user = Meteor.user();
+    return boardId && user && user.hasStarred(boardId);
+  },
+
+  // Only show the star counter if the number of star is greater than 2
+  showStarCounter: function() {
+    return this.currentData().stars > 2;
+  },
+
+  events: function() {
+    return [{
+      'click .js-edit-board-title': Popup.open('boardChangeTitle'),
+      'click .js-star-board': function() {
+        Meteor.user().toggleBoardStar(Session.get('currentBoard'));
+      },
+      'click .js-open-board-menu': Popup.open('boardMenu'),
+      'click .js-change-visibility': Popup.open('boardChangeVisibility'),
+      'click .js-open-filter-view': function() {
+        Sidebar.setView('filter');
+      },
+      'click .js-filter-reset': function(evt) {
+        evt.stopPropagation();
+        Sidebar.setView();
+        Filter.reset();
+      }
+    }];
+  }
+}).register('headerBoard');
+
+BlazeComponent.extendComponent({
+  template: function() {
+    return 'boardChangeColorPopup';
+  },
+
+  backgroundColors: function() {
+    return Boards.simpleSchema()._schema.color.allowedValues;
+  },
+
+  isSelected: function() {
+    var currentBoard = Boards.findOne(Session.get('currentBoard'));
+    return currentBoard.color === this.currentData().toString();
+  },
+
+  events: function() {
+    return [{
+      'click .js-select-background': function(evt) {
+        var currentBoardId = Session.get('currentBoard');
+        Boards.update(currentBoardId, {
+          $set: {
+            color: this.currentData().toString()
+          }
+        });
+        evt.preventDefault();
+      }
+    }];
+  }
+}).register('boardChangeColorPopup');
+
+BlazeComponent.extendComponent({
+  template: function() {
+    return 'createBoardPopup';
+  },
+
+  onCreated: function() {
+    this.visibilityMenuIsOpen = new ReactiveVar(false);
+    this.visibility = new ReactiveVar('private');
+  },
+
+  visibilityCheck: function() {
+    return this.currentData() === this.visibility.get();
+  },
+
+  setVisibility: function(visibility) {
+    this.visibility.set(visibility);
+    this.visibilityMenuIsOpen.set(false);
+  },
+
+  toogleVisibilityMenu: function() {
+    this.visibilityMenuIsOpen.set(! this.visibilityMenuIsOpen.get());
+  },
+
+  onSubmit: function(evt) {
+    evt.preventDefault();
+    var title = this.find('.js-new-board-title').value;
+    var visibility = this.visibility.get();
+
+    var boardId = Boards.insert({
+      title: title,
+      permission: visibility
+    });
+
+    Utils.goBoardId(boardId);
+  },
+
+  events: function() {
+    return [{
+      'click .js-select-visibility': function() {
+        this.setVisibility(this.currentData());
+      },
+      'click .js-change-visibility': this.toogleVisibilityMenu,
+      submit: this.onSubmit
+    }];
+  }
+}).register('createBoardPopup');
+
+BlazeComponent.extendComponent({
+  template: function() {
+    return 'boardChangeVisibilityPopup';
+  },
+
+  visibilityCheck: function() {
+    var currentBoard = Boards.findOne(Session.get('currentBoard'));
+    return this.currentData() === currentBoard.permission;
+  },
+
+  selectBoardVisibility: function() {
+    Boards.update(Session.get('currentBoard'), {
+      $set: {
+        permission: this.currentData()
+      }
+    });
+    Popup.close();
+  },
+
+  events: function() {
+    return [{
+      'click .js-select-visibility': this.selectBoardVisibility
+    }];
+  }
+}).register('boardChangeVisibilityPopup');