Don't send empty commands, use angular model instead of accessing

element value directly. Fixes problem with pressing enter will send
previous value in history.

js/glowingbear.js

@@ -1264,8 +1264,12 @@ weechat.directive('inputBar', function() {
                 var input = $scope.getInputNode();
                 var ab = models.getActiveBuffer();
 
+                // It's undefined early in the lifecycle of the program.
+                // Don't send empty commands
+                if($scope.command !== undefined && $scope.command !== '') {
+
                     // log to buffer history
-                ab.addToHistory(input.value);
+                    ab.addToHistory($scope.command);
 
                     // Split the command into multiple commands based on line breaks
                     _.each($scope.command.split(/\r?\n/), function(line) {
@@ -1279,7 +1283,8 @@ weechat.directive('inputBar', function() {
                     }
 
                     // Empty the input after it's sent
-                input.value = '';
+                    $scope.command = '';
+                }
             };
 
             // Handle key presses in the input bar