[FEATURE]: Bring back the original left sidebar / Option to disable top navbar sessions

Feature hasn''t been suggested before.

• I have verified this feature I''m about to request hasn''t been suggested before.

Describe the enhancement you want to request

I am writing to urgently request an option to restore the original left sidebar layout for project and session management. Currently, I am managing 14 active projects with 4 to 5 open sessions each. Forcing these sessions into a top navbar makes it impossible to work efficiently. The top navbar lacks the vertical screen real estate required to display this many concurrent items, leading to severe clutter and a highly degraded user experience. While I understand the drive for UI modernization, a top navbar simply does not scale for power users with heavy multitasking workflows. Please consider adding a toggle setting to move sessions back to a traditional vertical left sidebar. Thank you for your time and for your continuous work on the editor.

Related issues

Possibly related: #48882, #48956, #48966, #48802, #37012, #36942. Keeping this one open for the power-user scaling angle (14 active projects x 4-5 sessions each do not fit a top tab strip).