mainview: add sip input panel

Add sip input panel to be able to use DTMF functionalities.

Gitlab: #18
Change-Id: Iaa53ae2b34d9ce0d5cf19aa82dd41a5607203c62
diff --git a/ressources.qrc b/ressources.qrc
index f64f592..357fe0b 100644
--- a/ressources.qrc
+++ b/ressources.qrc
@@ -44,6 +44,7 @@
         <file>images/icons/ic_content_copy.svg</file>
         <file>images/icons/ic_delete_black_18dp_2x.png</file>
         <file>images/icons/ic_done_white_24dp.png</file>
+        <file>images/icons/ic_keypad.svg</file>
         <file>images/icons/open_in_full-24px.svg</file>
         <file>images/icons/close_fullscreen-24px.svg</file>
         <file>images/icons/ic_group_add_white_24dp.png</file>
@@ -97,9 +98,7 @@
         <file>images/icons/screen_share-24px.svg</file>
         <file>images/icons/round-add_a_photo-24px.svg</file>
         <file>images/icons/ic_mic_white_24dp.png</file>
-        <file>images/icons/icon-keypad-24.png</file>
         <file>images/icons/ic_play_white_24dp.png</file>
-        <file>images/icons/icon-keypad-24-2x.png</file>
         <file>images/icons/ic_voicemail_black_24dp_2x_.png</file>
         <file>images/icons/av_icons/delete-24px.svg</file>
         <file>images/icons/av_icons/fiber_manual_record-24px.svg</file>