Design suggestions

[ichernyshovvv]

Design suggestions

[ichernyshovvv]

Hi. Thank you for your contribution.

I've fixed compilation warnings, replaced all the manually constructed regexps with builtin constants and now I use ot-svg-obj global variable to search for a block under mouse cursor in ot-select-block-under-mouse. It's the only place I used this object though.

For searching over svg object, I used dom-search which returns all matched nodes. I think the dom.el library lacks of something like dom-find that returns only the first matched node (like seq-find). Maybe it's a good idea to send it in a patch.