Add an option to allow both viewing and adding duplicates (#693)

* Detect duplicates when checking if can add note

* Display the stacked add buttons

2 files changed, 124 insertions, 0 deletions

diff --git a/ext/images/add-duplicate-term-kana.svg b/ext/images/add-duplicate-term-kana.svg
new file mode 100644
index 00000000..9b574aee
--- /dev/null
+++ b/ext/images/add-duplicate-term-kana.svg
@@ -0,0 +1,40 @@
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diff --git a/ext/images/add-duplicate-term-kanji.svg b/ext/images/add-duplicate-term-kanji.svg
new file mode 100644
index 00000000..809d0159
--- /dev/null
+++ b/ext/images/add-duplicate-term-kanji.svg
@@ -0,0 +1,84 @@
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