0.2.6: search placeholder text, tighten fuzzy-match noise

Search entry's placeholder read "breadbox" -- the app's own name --
easily mistaken for an already-typed query. Now reads "Search apps...".

Bare-subsequence matching (e.g. "zen" matching "Avahi Zeroconf Browser"
via z...e...n) surfaced alongside real name-based hits like "Zen
Browser". The filter now hides subsequence-only rows whenever a
stronger, name-based match exists elsewhere in the results -- that kind
of noise now only shows up when it's the best any entry can do.

Note: bumping to 0.2.6, not 0.2.5 -- Cargo.toml had drifted one release
behind the actual latest tag (v0.2.5 already existed).

Cargo.lock

@@ -39,7 +39,7 @@ dependencies = [
 
 [[package]]
 name = "breadbox"
-version = "0.2.4"
+version = "0.2.6"
 dependencies = [
  "bread-theme",
  "breadbox-shared",
@@ -50,7 +50,7 @@ dependencies = [
 
 [[package]]
 name = "breadbox-shared"
-version = "0.2.4"
+version = "0.2.6"
 dependencies = [
  "serde",
  "serde_json",
@@ -59,7 +59,7 @@ dependencies = [
 
 [[package]]
 name = "breadbox-sync"
-version = "0.2.4"
+version = "0.2.6"
 dependencies = [
  "breadbox-shared",
  "serde_json",