When I click on the ‘Load Sample:’ dropdown list, there are no names displayed. According to the user documentation there are seven sample templates supplied. From what I can see there are seven items in the list but their names aren’t shown. This happens on the version I’ve got installed on my laptop (Windows 7, SuiteCRM v7.9.5) and on the demo version at (https://suitecrm.com/demo, also v7.9.5).
Also, is there a glitch when editing a template?
When I edit a template (Windows 7 and Demo version), the wysiwig edit panel only contains HTML code (not even with line breaks for each new statement) and the HTML editor contains the same (I would expect it to be a line editor).
Also, on the demo version, although a list of templates created is shown, when one clicks on a template to view it the panel doesn’t show. It just shows an empty dashboard.
For the other issues, can you try experimenting with the settings in your user profile. At the bottom you will find “Email settings” and there are some things there about your Email editor, maybe you can do what you want changing something there?
I don’t know any solutions for the HTML editing, but now that you’ve visited Github you might search it for related issues. Sometimes you find somebody else already identified a problem similar to yours, and sometimes there are even suggested fixes. Good luck.