Improve Application UI

[yashTEF]

This PR consists of the following changes:

1. Improved layout and structuring for the application homepage, with some added visual effects.
2. Added a progress bar to the web pages for a better ease in on load events.

[yashTEF]

@m-reza-rahman , I have used boilerplate code for the implementation of some of the features.
Curious to know as to how licensing works when it comes to open source software and what can be reproduced and manipulated, this is something a bit unclear to me.

[m-reza-rahman]

Where did the originals come from and did they have a license?

[yashTEF]

The files src/main/webapp/resources/js/topbar.js, src/main/webapp/resources/js/topbar.min.js
are obtained from: https://github.com/buunguyen/topbar and are covered under the MIT license.

[m-reza-rahman]

OK. MIT is a compatible license for us, so there are no issues to address. I’ll review and merge as soon as possible.

[yashTEF]

For future reference, what are some things you keep in mind when you encounter library software or dealing with the legal aspects for the same. I have seen MIT, EPL, GPL licenses and their usages but still somewhat unclear to me.

[m-reza-rahman]

We are MIT ourselves, so it is straightforward. Generally any copy-left licenses are fine, but we have to evaluate compatibility on a case-by-case basis. To be honest we try to minimize copy-pasted code and external dependencies as much as possible. Even if licensing is fine, there can be other legal issues.

[m-reza-rahman]

Good work, @yashTEF. I tested and everything looks solid so far.

[m-reza-rahman]

Hi @yashTEF, as part of this work, can you please look into upgrading to PrimeFaces 12 and the "saga" theme? Our current PrimeFaces version and theme are quite old at this point.

[yashTEF]

Hi @yashTEF, as part of this work, can you please look into upgrading to PrimeFaces 12 and the "saga" theme? Our current PrimeFaces version and theme are quite old at this point.

Indeed, while looking for possible improvements and going through the primefaces documentation I noticed that some components and themes are not available(and also the rendering and styling for the latest version is better) so this should be adopted.

I have updated the dependencies but the styling and structure of JSF pages will need some changes for seamless integration.