Adjust file finder width configuration (#20819)

Follow up to: https://github.com/zed-industries/zed/pull/18682

This PR tweaks the setting value, so it's clear we're referring to
`max-width`, meaning the width will change up to a specific value
depending on the available window size. Then, it also makes `Small` the
default value, which, in practice, makes the modal size the same as it
was before the original PR linked above.

Release Notes:

- N/A

---------

Co-authored-by: Kirill Bulatov <mail4score@gmail.com>

crates/file_finder/src/file_finder_settings.rs

@@ -2,13 +2,11 @@ use anyhow::Result;
 use schemars::JsonSchema;
 use serde_derive::{Deserialize, Serialize};
 use settings::{Settings, SettingsSources};
-use std::cmp;
-use ui::Pixels;
 
 #[derive(Deserialize, Debug, Clone, Copy, PartialEq)]
 pub struct FileFinderSettings {
     pub file_icons: bool,
-    pub modal_width: FileFinderWidth,
+    pub modal_max_width: Option<FileFinderWidth>,
 }
 
 #[derive(Clone, Default, Serialize, Deserialize, JsonSchema, Debug)]
@@ -17,10 +15,10 @@ pub struct FileFinderSettingsContent {
     ///
     /// Default: true
     pub file_icons: Option<bool>,
-    /// The width of the file finder modal.
+    /// Determines how much space the file finder can take up in relation to the available window width.
     ///
-    /// Default: "medium"
-    pub modal_width: Option<FileFinderWidth>,
+    /// Default: small
+    pub modal_max_width: Option<FileFinderWidth>,
 }
 
 impl Settings for FileFinderSettings {
@@ -36,40 +34,10 @@ impl Settings for FileFinderSettings {
 #[derive(Debug, PartialEq, Eq, Clone, Copy, Default, Serialize, Deserialize, JsonSchema)]
 #[serde(rename_all = "lowercase")]
 pub enum FileFinderWidth {
-    Small,
     #[default]
+    Small,
     Medium,
     Large,
     XLarge,
     Full,
 }
-
-impl FileFinderWidth {
-    const MIN_MODAL_WIDTH_PX: f32 = 384.;
-
-    pub fn padding_px(&self) -> Pixels {
-        let padding_val = match self {
-            FileFinderWidth::Small => 1280.,
-            FileFinderWidth::Medium => 1024.,
-            FileFinderWidth::Large => 768.,
-            FileFinderWidth::XLarge => 512.,
-            FileFinderWidth::Full => 0.,
-        };
-
-        Pixels(padding_val)
-    }
-
-    pub fn calc_width(&self, window_width: Pixels) -> Pixels {
-        if self == &FileFinderWidth::Full {
-            return window_width;
-        }
-
-        let min_modal_width_px = Pixels(FileFinderWidth::MIN_MODAL_WIDTH_PX);
-
-        let padding_px = self.padding_px();
-        let width_val = window_width - padding_px;
-        let finder_width = cmp::max(min_modal_width_px, width_val);
-
-        finder_width
-    }
-}