fix #1773 clear session on index page

src/main/java/org/codelibs/fess/app/web/admin/dict/kuromoji/AdminDictKuromojiAction.java

@@ -69,6 +69,7 @@ public class AdminDictKuromojiAction extends FessAdminAction {
     @Execute
     public HtmlResponse index(final SearchForm form) {
         validate(form, messages -> {}, () -> asDictIndexHtml());
+        kuromojiPager.clear();
         return asHtml(path_AdminDictKuromoji_AdminDictKuromojiJsp).renderWith(data -> {
             searchPaging(data, form);
         });

src/main/java/org/codelibs/fess/app/web/admin/dict/mapping/AdminDictMappingAction.java

@@ -72,6 +72,7 @@ public class AdminDictMappingAction extends FessAdminAction {
     @Execute
     public HtmlResponse index(final SearchForm form) {
         validate(form, messages -> {}, () -> asDictIndexHtml());
+        charMappingPager.clear();
         return asHtml(path_AdminDictMapping_AdminDictMappingJsp).renderWith(data -> {
             searchPaging(data, form);
         });

src/main/java/org/codelibs/fess/app/web/admin/dict/protwords/AdminDictProtwordsAction.java

@@ -69,6 +69,7 @@ public class AdminDictProtwordsAction extends FessAdminAction {
     @Execute
     public HtmlResponse index(final SearchForm form) {
         validate(form, messages -> {}, () -> asDictIndexHtml());
+        protwordsPager.clear();
         return asHtml(path_AdminDictProtwords_AdminDictProtwordsJsp).renderWith(data -> {
             searchPaging(data, form);
         });

src/main/java/org/codelibs/fess/app/web/admin/dict/synonym/AdminDictSynonymAction.java

@@ -72,6 +72,7 @@ public class AdminDictSynonymAction extends FessAdminAction {
     @Execute
     public HtmlResponse index(final SearchForm form) {
         validate(form, messages -> {}, () -> asDictIndexHtml());
+        synonymPager.clear();
         return asHtml(path_AdminDictSynonym_AdminDictSynonymJsp).renderWith(data -> {
             searchPaging(data, form);
         });