[KevinH]

I will restore the use of Double-click to select word under cursor for Sigil-1.5.1 and explore using other modifiers.

Edit: But that was easier said than done.

It seems Sigil's CV uses Ctrl-Doubleclick to follow styles and images to their source.
so using Control is Out.

It seems Alt is used to launch right click menus on macOS at the system level since not all mac's have their mice set to know the difference between left click and right click. So ALT is out.

If we are going to restore double-clcik to always select the word under the cursor no matter if in a tab or not ....

Then we can only support ONE of the following:

A. Use Shift Double-Click to select the just contents of the tag (not the tag code itself)

OR

B. Use Shift DoubleClick to select both the contents of the tag and the tag code itself

Which is more useful? In a future version we could make this an option but for Sigil-1.5.1 I do not want to have to add menus and preferences which would mean another translation pass would be needed.