Fix drag and drop from inactive panels

[cheack]

Problem Description

When using "Extra Pane" mode (two panels), users cannot drag files from an inactive panel to an active one. The issue occurs because:

1. File selection is blocked - clicking on files in inactive panels doesn't select them
2. Drag and drop is prevented - drag operations can only start from active panels
3. Poor UX - users must first click on the inactive panel to activate it, then click again to select files

Root Cause Analysis
The problem was in the button_press_callback function in src/nemo-list-view.c at line 1123. When a user clicked on an inactive panel:

if (!nemo_view_get_active (NEMO_VIEW (view))) {
    NemoWindowSlot *slot = nemo_view_get_nemo_window_slot (NEMO_VIEW (view));
    nemo_window_slot_make_hosting_pane_active (slot);
    return TRUE;  // ← This was the problem.
}

The return TRUE; statement immediately terminated the button press event processing, preventing:

• File selection
• Drag state initialization (drag_button setting)
• Subsequent drag and drop operations

What This Fix Achieves

1. Panel Activation - The inactive panel becomes active when clicked (as before).
2. Event Continuation - Button press processing continues normally
3. File Selection - Files can now be selected in previously inactive panels
4. Cross-Panel Operations - Users can drag files between panels without extra clicks

DEMO

Before

before-2025-08-31_08.31.20.mp4

After

after-2025-08-31_08.34.42.mp4