ENYO-3062:DnD control point disappear in designer

Enyo-DCO-1.1-Signed-off-by: hgpark uionion@gmail.com
ENYO-3129: Display an error message when the values entred into the inputs "Splash screen duration" & "Load URL timeout" are not numbers.

If the error message is displayed the "OK" button on the Pop-up is disable, it will be enabled if the values entred into these inputs are numbers.
ENYO-3129: an error message is displayed under the pickers if the interval the min/max API level isn't correct (min API level value is greater than the max API level value).

notice that if there are two displayed errors on the panel the correction of one of these error will re-enable the 'OK' button of the Pop-up which is an unwanted behaviours.
This issue will be treated in one of the next commits.
ENYO-3129: an error message is displayed under an image path selector (icon & splash screen) if the values of the length and width of the image aren't a numbers
ENYO-1887: add palette filtering feature that can be reseted by clicking on the text input icon (must wait enyo to be updated to pilot-8 or above)
ENYO-1887: improve code readability
ENYO-3139: update version to 0.2.6-pre.2
ENYO-3202 : Wrong save action in designer
- modified msg data in Designer.js

ENYO-DCO-1.1-Signed-off-by: Kiwook Shim <kiwook.shim@lge.com>
ENYO-3062:DnD control point disappear in designer

Enyo-DCO-1.1-Signed-off-by: hgpark uionion@gmail.com
ENYO-3241: Updated enyo and layout to pilot-8
Merge pull request #593 from enyojs/ENYO-3202-kiwook

ENYO-3202 : Wrong save action in designer

It is great! The code change style is fantastic. I like to change source code as little as possible!!! Thank you for your support!!!
ENYO-3129: Enforce the test on all the Phonegap build UI.

The button Ok will be enabled only if all the value are valides.
ENYO-3129: add a missing semi-column.
ENYO-3129: add a description in the place holder of the inputs "Splash screen duration", "Load url timeout", "length" & "width".
ENYO-3129: change the label "Length" to "Height".
ENYO-3129: disable the inputs of the filechooser widgets in Phonegap build panel.
ENYO-2893: set env variable for bundle browser path

Enyo-DCO-1.1-Signed-off-by: Junil Kim <logyourself@gmail.com>
ENYO-2893: if no bundledBrowser option, then clear ARES_BUNDLE_BROWSER env variable

Enyo-DCO-1.1-Signed-off-by: Junil Kim <logyourself@gmail.com>
ENYO-2893: added executable file mode for launching script for chromium bundle browser

Enyo-DCO-1.1-Signed-off-by: Junil Kim <logyourself@gmail.com>
ENYO-2893: fixed env variable

Enyo-DCO-1.1-Signed-off-by: Junil Kim <logyourself@gmail.com>