Fine-tunes tooltip UI.

Source/InputMethodController.mm

@@ -336,6 +336,8 @@ static double FindHighestScore(const vector<NodeAnchor>& nodes, double epsilon)
     gCurrentCandidateController.delegate = nil;
     gCurrentCandidateController.visible = NO;
     [_candidates removeAllObjects];
+
+    [self _hideTooltip];
 }
 
 - (void)setValue:(id)value forTag:(long)tag client:(id)sender
@@ -411,6 +413,7 @@ static double FindHighestScore(const vector<NodeAnchor>& nodes, double epsilon)
     [_composingBuffer setString:@""];
     gCurrentCandidateController.visible = NO;
     [_candidates removeAllObjects];
+    [self _hideTooltip];
 }
 
 NS_INLINE size_t min(size_t a, size_t b) { return a < b ? a : b; }

Source/en.lproj/Localizable.strings

@@ -64,3 +64,7 @@
 "Edit Excluded Phrases" = "Edit Excluded Phrases";
 
 "Use Half-Width Punctuations" = "Use Half-Width Punctuations";
+
+"You are now selecting \"%@\". You can add a phrase with two or more characters." = "You are now selecting \"%@\". You can add a phrase with two or more characters.";
+
+"You are now selecting \"%@\". Press enter to add a new phrase." = "You are now selecting \"%@\". Press enter to add a new phrase.";

Source/zh-Hant.lproj/Localizable.strings

@@ -65,3 +65,6 @@
 
 "Use Half-Width Punctuations" = "使用半型標點符號";
 
+"You are now selecting \"%@\". You can add a phrase with two or more characters." = "您目前選擇了 \"%@\"。請選擇兩個字以上，才能加入使用者詞彙。";
+
+"You are now selecting \"%@\". Press enter to add a new phrase." = "您目前選擇了 \"%@\"。按下 Enter 就可以加入到使用者詞彙中。";