Add option to remove manually approved certificates

- "Remove certificates" option brings up a dialog that allows
  to delete certificates from MemorizingTrustManager's keystore
- Reconnect active accounts when certificate-settings are changed
- new preference category "Certificate options"

3 files changed, 33 insertions, 5 deletions

diff --git a/src/main/res/values-de/strings.xml b/src/main/res/values-de/strings.xml
index addc55de..d5f550a3 100644
--- a/src/main/res/values-de/strings.xml
+++ b/src/main/res/values-de/strings.xml
@@ -429,8 +429,19 @@
   <string name="received_location">Standort empfangen</string>
   <string name="title_undo_swipe_out_conversation">Unterhaltung beendet</string>
   <string name="title_undo_swipe_out_muc">Konferenz verlassen</string>
+  <string name="pref_certificate_options">Zertifikats-Optionen</string>
   <string name="pref_dont_trust_system_cas_title">Misstraue Zertifizierungsstellen</string>
   <string name="pref_dont_trust_system_cas_summary">Alle Zertifikate müssen manuell bestätigt werden</string>
+  <string name="pref_remove_trusted_certificates_title">Zertifikate löschen</string>
+  <string name="pref_remove_trusted_certificates_summary">Als vertrauenswürdig bestätigte Zertifikate löschen</string>
+  <string name="toast_no_trusted_certs">Keine manuell bestätigten Zertifikate</string>
+  <string name="dialog_manage_certs_title">Zertifikate löschen</string>
+  <string name="dialog_manage_certs_positivebutton">Auswahl löschen</string>
+  <string name="dialog_manage_certs_negativebutton">Abbrechen</string>
+  <plurals name="toast_delete_certificates">
+	<item quantity="one">%d Zertifikat gelöscht</item>
+    <item quantity="other">%d Zertifikate gelöscht</item>
+  </plurals>
   <plurals name="select_contact">
     <item quantity="one">%d Kontakt ausgewählt</item>
     <item quantity="other">%d Kontakte ausgewählt</item>
diff --git a/src/main/res/values/strings.xml b/src/main/res/values/strings.xml
index 4a36163c..cc7727d2 100644
--- a/src/main/res/values/strings.xml
+++ b/src/main/res/values/strings.xml
@@ -457,8 +457,19 @@
     <string name="received_location">Received location</string>
 	<string name="title_undo_swipe_out_conversation">Conversation closed</string>
 	<string name="title_undo_swipe_out_muc">Left conference</string>
+	<string name="pref_certificate_options">Certificate options</string>
 	<string name="pref_dont_trust_system_cas_title">Don’t trust system CAs</string>
 	<string name="pref_dont_trust_system_cas_summary">All certificates must be manually approved</string>
+	<string name="pref_remove_trusted_certificates_title">Remove certificates</string>
+	<string name="pref_remove_trusted_certificates_summary">Delete manually approved certificates</string>
+	<string name="toast_no_trusted_certs">No manually approved certificates</string>
+	<string name="dialog_manage_certs_title">Remove certificates</string>
+	<string name="dialog_manage_certs_positivebutton">Delete selection</string>
+	<string name="dialog_manage_certs_negativebutton">Cancel</string>
+	<plurals name="toast_delete_certificates">
+		<item quantity="one">%d certificate deleted</item>
+		<item quantity="other">%d certificates deleted</item>
+	</plurals>
 	<plurals name="select_contact">
 		<item quantity="one">Select %d contact</item>
 		<item quantity="other">Select %d contacts</item>
diff --git a/src/main/res/xml/preferences.xml b/src/main/res/xml/preferences.xml
index 9cf0100f..417e60a4 100644
--- a/src/main/res/xml/preferences.xml
+++ b/src/main/res/xml/preferences.xml
@@ -142,6 +142,17 @@
 			        android:title="@string/pref_display_enter_key"
 			        android:summary="@string/pref_display_enter_key_summary" />
 	        </PreferenceCategory>
+			<PreferenceCategory android:title="@string/pref_certificate_options">
+				<CheckBoxPreference
+					android:defaultValue="false"
+					android:key="dont_trust_system_cas"
+					android:title="@string/pref_dont_trust_system_cas_title"
+					android:summary="@string/pref_dont_trust_system_cas_summary" />
+				<Preference
+					android:key="remove_trusted_certificates"
+					android:title="@string/pref_remove_trusted_certificates_title"
+					android:summary="@string/pref_remove_trusted_certificates_summary" />
+			</PreferenceCategory>
             <PreferenceCategory android:title="@string/pref_expert_options_other" >
                 <CheckBoxPreference
                     android:defaultValue="false"
@@ -153,11 +164,6 @@
                     android:key="keep_foreground_service"
                     android:title="@string/pref_keep_foreground_service"
                     android:summary="@string/pref_keep_foreground_service_summary" />
-				<CheckBoxPreference
-					android:defaultValue="false"
-					android:key="dont_trust_system_cas"
-					android:title="@string/pref_dont_trust_system_cas_title"
-					android:summary="@string/pref_dont_trust_system_cas_summary" />
             </PreferenceCategory>
         </PreferenceScreen>