Spanish UI - update to latest Japanese .ts files

[gab3d]

Spanish UI - update to latest Japanese .ts files
There are still some untranslatable strings...

[shun-iwasawa]

LGTM Thank you @gab3d . I didn't know that RGB is translated as RVA in Spanish.

For the future PR, I must beg of you to create a new branch from the current master and just commit the latest translation. Here are some instructions:

• Add upstream repository that will be synced with the original repo. (Do once if you have not added yet.)

$ git remote add upstream https://github.com/opentoonz/opentoonz.git

• Synchronize your master (local master branch) and origin/master (remote master branch) to the current upstream.

$ git checkout master
$ git pull upstream master
$ git push origin master

• Create a new branch for translation work (For example, named nice_branch_name ).

$ git checkout -b nice_branch_name master

• Do translation work on the branch nice_branch_name and then commit changes.

$ git add path_to_translation_file.ts
$ git commit

or
$ git commit -a

• Push your branch.

$ git push origin nice_branch_name

• Go to github site and make a new PR.