Improvements to KIE homepage

Description of problem:
The current homepage has some visual elements that distract the user from the content because they are not properly aligned.

Version-Release number of selected component (if applicable):
6.0.0.ER2

Additional info:
The following CSS changes remove some of the visual issues without creating any additional code so that we can keep the change minimal but improve the page. I have attached an image of what the final result should look like.

.well class in bootstrap.min.css (line 699) - disable background-color, border, and box-shadow attributes
.carousel-control class in bootstrap.min.css (line 685) - disable background and border attributes