avoid alloc

Dependencies

• [2] 23SFYK4Q big view refactor into a new crate
• [3] WW36JYLR add iced_nav_scrollable widget crate
• [4] WIFVLV37 nav-scrollabe: detect size to determine if needs scrolling, msg when ready
• [5] SASAN2XC use nav-scrollable
• [6] MYGIBRRH wip custom theme

Change contents

• edit in inflorescence_view/src/diff.rs at line 97
  [5.691]

  [5.691]
  + let children_len = sections_view.len();
• edit in inflorescence_view/src/diff.rs at line 103
  [5.834]

  [5.834]
  + children_len,
• replacement in inflorescence_view/src/diff.rs at line 132
  [2.6088]→[5.1110:1303](∅→∅)
  − // TODO: only collecting to get `ExactSizeIterator` for `iced_nav_scrollable::view`, but the size can be determined from lengths of the two vecs

  − let diffs: Vec<_> = diffs_with_contents
  [2.6088]

  [2.6124]
  + let diffs = diffs_with_contents
• replacement in inflorescence_view/src/diff.rs at line 139
  [2.6303]→[5.1304:1334](∅→∅)
  − )

  − .collect();
  [2.6303]

  [2.6314]
  + );

  + let diffs_len = diffs_with_contents.len() + diffs_without_contents.len();
• replacement in inflorescence_view/src/diff.rs at line 147
  [5.1515]→[5.1515:1550](∅→∅)
  − diffs.into_iter(),
  [5.1515]

  [5.1550]
  + diffs,

  + diffs_len,
• replacement in iced_nav_scrollable/src/lib.rs at line 215
  [3.3617]→[3.3617:3724](∅→∅)
  − children: impl IntoIterator<Item = Element<'a, Message, Theme, Renderer>>

  − + ExactSizeIterator,
  [3.3617]

  [4.4296]
  + children: impl IntoIterator<Item = Element<'a, Message, Theme, Renderer>>,

  + children_len: usize,
• replacement in iced_nav_scrollable/src/lib.rs at line 225
  [3.3943]→[4.4354:4636](∅→∅)
  − debug_assert_eq!(nav.section_heights.len(), children.len(), "The `NavScrollable` was most likely initialized with a count different from the number of actual children given to the the view function. Count is {}, but got {} children", nav.section_heights.len(), children.len());
  [3.3943]

  [3.4211]
  + debug_assert_eq!(nav.section_heights.len(), children_len, "The `NavScrollable` was most likely initialized with a count different from the number of actual children given to the the view function. Count is {}, but got {} children", nav.section_heights.len(), children_len);