Fix Pick color button size

Now it matches the field height
Force pick color button height

This seems to work fine, at least on Firefox (Gecko) and Chromium
(WebKit/Blink)
Merge pull request #68 from mezuro/btnsizefix

Fix Pick color button size
first step to refactor the configuration workflow
first attempt to add javascript into configuration show
Adaptation of view of metric_configurations according to the prototype, adding a new button in order to replace the add metric and new fields for metrics configuration.
Signed-off-by: Renan Costa Filgueiras <renan2727@hotmail.com>
td contents of partial _metric_configuration are replaced by input texts when clicked

Signed-off-by: Vinícius Vieira <vvieira17@gmail.com>
Signed-off-by: Renan Costa Filgueiras <renan2727@hotmail.com>
table layout adjusted