viewer: migrate to vue 3, general refactoring and cleanup

Non-exhaustive list of fixes and improvements done at the same time:

- html default background to grey (avoids white flash during init)
- unified links behavior
- added more theme variables
- removed the flex-expand transition (it wasn't working) and replaced it
  with a slide
- fixed LdLoading not centered on the content
- title on removable tags
- fixed an issue with encoded URI from vue-router
- unified Item resource URLs
- removed the iframe for PlainTextViewer (it wasn't working properly)
  and replaced it with a pre
- fixed clear and search buttons tabindex
- fixed the information panel bumping up during the fade animation of
  tag's dropdown
- fixed some focus outlines not appearing correctly
- moved CSS variables to the :root context
- Code cleaning

GitHub: closes #217
GitHub: closes #300
GitHub: closes #297
GitHub: closes #105
GitHub: closes #267
GitHub: closes #275
GitHub: closes #228
GitHub: closes #215
GitHub: closes #112

1 files changed, 1 insertions, 1 deletions

diff --git a/viewer/src/assets/scss/scrollbar.scss b/viewer/src/assets/scss/scrollbar.scss
index 4ca0a2c..d40d1a1 100644
--- a/viewer/src/assets/scss/scrollbar.scss
+++ b/viewer/src/assets/scss/scrollbar.scss
@@ -17,7 +17,7 @@
 -- along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-@import "~@/assets/scss/theme.scss";
+@import "theme";
 
 // === Scrollbar styling