Minor fixes for multiple plugins

[shashigharti]

• Partial fixes Make minor changes to existing plugins #892

Article Link

• Add on hover / on click states (search for "Article" here)
• Make URL field non-mandatory

Banner

• Implement different colors for each variation (search for "Banner" here)
• Enable markdown in the Text field

Carousel

• Display each image's Alt text after 1 sec mouse hover

OKImage

• When not In column, display the caption below the image, not inside
• Change the option text from Show caption to Use caption instead of text
• Display Alt text after 1 sec mouse hover

Feature Block

• Add the small arrow to the "Learn more" button (gets activated when an URL is added) -- already fixed(PR Create additional plugins for lists and stats #895)
• Yellow and Yellow background currently have the same layout. Needs to recover Yellow as the original yellow squared box (search for "Content Grid" here)
• Add option Text white to Blue background, Yellow background, Purple background and Rounded corners
• Add on hover / on click states to Blue background, Yellow background, Purple background and Rounded corners
• Change type name from Yellow to Yellow Box
• Change variant name from White to White Box

Gallery

• Rename plugin to "Running Gallery"
• Stop automatic scroll on mouse hover
• Make it draggable
• Display each image's Alt text after 1 sec mouse hover

[shashigharti]

For gallery I did add the params 'pauseOnHover' and 'draggable' but it does not seem to work as expected. On hover it stops but after some time and it is draggable 'only once' when the slider stops.

[pdelboca]

@shashigharti agree that the draggable feature of the carousel is not working. Maybe it would be worth it to work on in in a separated PR?

[shashigharti]

I have submitted new bug report for 'draggable' feature #977.