[Epic]: Stabilize Studio

[dinomut1]

STUDIO BUGS

-local dev: authentication only works on login page, cannot go directly to studio
-- on login page, authentication can take upwards of 5 minutes

-reparenting object breaks hierarchy panel and properties panel [#9850]

-assets panel: 'unknown' shelf category which crashes engine on click [#9993]

-file browser: With the material library panel active, having a 3d model open in preview panel, then selecting an image causes engine to crash [#9994]

-reparenting a 3d model does not clear the material library, resulting in duplicate material entries [#9995]

-drag and drop: objects are placed underneath ground plane [#9996]

-on deployment: saving a gltf with the same filename will not invalidate cloudfront cache, resulting in changes being lost [#9997]
-- forces saving files with new file names every time

-when gizmo is active, cannot click on anything else in the scene [#9998]

-on studio load, first left click instantly rotates camera 45 degrees downward for no reason [#9999]

-cannot click on ground plane to select

-toggling visibility on an entity does not affect its children [#10000]
--makes visibility toggle on a model component essentially useless

-on opening new project, left panel is a tiny sliver

-toggling csm breaks csm on re-enable [#10002]

-csm parameters are not exposed anywhere, and are incorrectly configured on initialization

-'x' button on object grid snap node editor is no-op

-switching scenes does not clear material library, entries remain from old scene

-none of the pivot options work, for single or multi select [#10003]

-cannot disable bbox snapping on anything, so models cannot be snapped while inside of other models (like assembling a room inside of a cave or something similar)

-assets panel: bottom row of assets in drawer are half-obscured

-assets panel: drag and drop doesn't work [#9992]

-on scene change: collider guides are not visible if "show physics helpers" enabled during scene load -- need to be toggled to be made visible

-"Add Entity" button sometimes does not work

-changing scenes sometimes freezes studio

-on loading scene, sometimes entire hierarchy is collapsed

-play mode: camera movement doesn't respond. Breaks right click

-adding a collider onto an entity in studio doesn't actually generate a collider [#10005]