Disable +/- when FloatInput/IntInput are disabled (#691)

Author: philippjfr

src/panel_material_ui/widgets/NumberInput.jsx

@@ -124,14 +124,14 @@ export function render({model, el, view}) {
           sx: {padding: 0},
           startAdornment: (
             <InputAdornment position="start">
-              <IconButton onClick={() => decrement()} size="small" color="default">
+              <IconButton onClick={() => decrement()} size="small" color="default" disabled={disabled}>
                 <RemoveIcon fontSize="small" />
               </IconButton>
             </InputAdornment>
           ),
           endAdornment: (
             <InputAdornment position="end">
-              <IconButton onClick={() => increment()} size="small" color="default">
+              <IconButton onClick={() => increment()} size="small" color="default" disabled={disabled}>
                 <AddIcon fontSize="small" />
               </IconButton>
             </InputAdornment>