fix: Clicking a folder in file explorer panel sometimes fails to open or close it

[jason-wang24]

Fixes #1085

• isDragging was always set to true on itemMouseMove which prevented onSelect from firing on even the slightest of mouse movements while clicking
• Set isDragging to true only if the mouse moves at least 5 viewport units in the X or Y direction between the mouseDown and mouseUp events (attempted to get this value as close as possible to when the UI changes to indicate dragging)

[codecov]

Codecov Report

Merging #1099 (924326a) into main (9aab657) will increase coverage by 0.00%.
The diff coverage is 85.71%.

@@           Coverage Diff           @@
##             main    #1099   +/-   ##
=======================================
  Coverage   42.91%   42.91%           
=======================================
  Files         434      434           
  Lines       32593    32597    +4     
  Branches     8198     8201    +3     
=======================================
+ Hits        13987    13990    +3     
- Misses      18557    18558    +1     
  Partials       49       49           

Flag	Coverage Δ
unit	42.91% <85.71%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
packages/components/src/ItemList.tsx	73.92% <85.71%> (+0.01%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.