feat: Improve draggable behavior in overlay layout

* Set position=absolute on each block, so they won't affect each others'
  y value when display=none (about Block Formatting Context)
* Add title tooltip for removing block
* Simple logic to set initial position of block by their width

1 files changed, 1 insertions, 0 deletions

diff --git a/src/css/dumbymap.css b/src/css/dumbymap.css
index 1dc7a09..8e28af5 100644
--- a/src/css/dumbymap.css
+++ b/src/css/dumbymap.css
@@ -142,6 +142,7 @@
 
     > .draggable-block {
       box-sizing: content-box;
+      position: absolute;
       width: fit-content;
       max-height: 50vh;
       overflow: scroll;