I have added Nivo Slider to my Joomla extension Views for Joomla as a sample layout. Hope this gives you an idea about how you can chuck in jQuery Gallery plugin into your Joomla site.
I have noticed the font size gets squashed with Joomla default template "bluestork" for backend when I edit the content by raw mode.
And this is what I do until the situation gets amended.
You need to amend the code to suit your situation but this sample code should give you an idea about how to do it.
This is what I put to figure out what is wrong with SQL if it is in Joomla model class.
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