Confirm box using glide modal (#819)

* Create style.css

* Create readme.md

* Delete Styles/Add Background Color directory

* Create glide_confirm.js

Script to pop up a confirm box in your UI to make the UI rich and easy with the help of GlideModal.

* Create readme.md

* Update glide_confirm.js

Author: kmohit2809

GlideModal/Confirm Message/glide_confirm.js

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+var gm = new GlideModal("glide_confirm", false, 600); // glide_confirm is the OOB prebuilt UI page.
+gm.setTitle("Conform box title"); // The title for your confirm message box
+gm.setPreference("title", "confirm box body"); // this will be the body for your confirm message
+gm.setPreference("warning", "false"); // put it true if you want to display a warning sign on your confirm box
+gm.setPreference("onPromptSave", function() {alert("You clicked on 'Save'")});
+gm.setPreference("onPromptDiscard", function() {alert("You clicked on 'Don't save'")});
+gm.setPreference("onPromptCancel", function() {alert("You clicked on 'Cancel'")});
+gm.render();

GlideModal/Confirm Message/readme.md

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+This script will be helpful to get a confirm box with the help of GlideModal, this can be leveraged in your clint side scripts or UI actions. Confirm and alerts, which we get by 
+using standard Javascript window methods can be easily blocked by user's browser, but GlideModal confirm will still display and this enhances the User exeprince.
+
+With the help of this script we can get a confirmation pop-up with "Don't save", "Cancel", and "Save" buttons.