ui: update callwidget buttons

- buttons are .css and .ui based.

- .svg used as icons are set in .ui.

- .svg updated, filled circles removed.

- backgrounds and borders are set in .css.

- redundant and no-more-used code in callwidget.cpp/instantmessagingwidget.cpp removed.

Change-Id: I9c52801a49d503c3c6a7dc8df9ae02ff90bb6a67
Tuleap: #148
diff --git a/ressources.qrc b/ressources.qrc
index 63a2a9b..dc12fe6 100644
--- a/ressources.qrc
+++ b/ressources.qrc
@@ -1,47 +1,48 @@
 <RCC>
-    <qresource prefix="/">
-        <file>stylesheet.css</file>
-        <file>images/ring.png</file>
-        <file>images/arrow-down-bold-circle-outline.png</file>
-        <file>images/arrow-left-bold.png</file>
-        <file>images/arrow-up-bold-circle-outline.png</file>
-        <file>images/close.png</file>
-        <file>images/logo-ring-standard-coul.png</file>
-        <file>images/minus.png</file>
-        <file>images/plus.png</file>
-        <file>images/settings.png</file>
-        <file>images/arrow-down.png</file>
-        <file>images/arrow-up.png</file>
-        <file>images/folder-download.png</file>
-        <file>images/arrow-right.png</file>
-        <file>images/history.png</file>
-        <file>images/close-ring.png</file>
-        <file>images/minimize-ring.png</file>
-        <file>images/maximize-ring.png</file>
-        <file>images/search-contact.png</file>
-        <file>images/hover-contact/btn-video.svg</file>
-        <file>images/hover-contact/btn-chat.svg</file>
-        <file>images/hover-contact/btn-contactinfo.svg</file>
-        <file>images/contactswidgetlist.png</file>
-        <file>images/historylist.png</file>
-        <file>images/user/btn-default-userpic.svg</file>
-        <file>images/call/btn-call.svg</file>
-        <file>images/call/btn-answer.svg</file>
-        <file>images/call/btn-ignore.svg</file>
-        <file>images/video-conf/btn-hangup.svg</file>
-        <file>images/video-conf/btn-pause.svg</file>
-        <file>images/video-conf/btn-pause-toggled.svg</file>
-        <file>images/video-conf/btn-chat.svg</file>
-        <file>images/video-conf/btn-nomic.svg</file>
-        <file>images/video-conf/btn-nomic-toggled.svg</file>
-        <file>images/video-conf/btn-novideo.svg</file>
-        <file>images/video-conf/btn-novideo-toggled.svg</file>
-        <file>images/video-conf/btn-missing.svg</file>
-        <file>images/video-conf/btn-add-contact-to-conf.svg</file>
-        <file>images/video-conf/btn-transfer.svg</file>
-        <file>images/btn-info.svg</file>
-        <file>images/ic_arrow_back_white.svg</file>
-        <file>images/video-conf/ic_high_quality_white.svg</file>
-        <file>images/ic_send_white.svg</file>
-    </qresource>
+  <qresource prefix="/">
+    <file>images/video-conf/btn-join.svg</file>
+    <file>stylesheet.css</file>
+    <file>images/ring.png</file>
+    <file>images/arrow-down-bold-circle-outline.png</file>
+    <file>images/arrow-left-bold.png</file>
+    <file>images/arrow-up-bold-circle-outline.png</file>
+    <file>images/close.png</file>
+    <file>images/logo-ring-standard-coul.png</file>
+    <file>images/minus.png</file>
+    <file>images/plus.png</file>
+    <file>images/settings.png</file>
+    <file>images/arrow-down.png</file>
+    <file>images/arrow-up.png</file>
+    <file>images/folder-download.png</file>
+    <file>images/arrow-right.png</file>
+    <file>images/history.png</file>
+    <file>images/close-ring.png</file>
+    <file>images/minimize-ring.png</file>
+    <file>images/maximize-ring.png</file>
+    <file>images/search-contact.png</file>
+    <file>images/hover-contact/btn-video.svg</file>
+    <file>images/hover-contact/btn-chat.svg</file>
+    <file>images/hover-contact/btn-contactinfo.svg</file>
+    <file>images/contactswidgetlist.png</file>
+    <file>images/historylist.png</file>
+    <file>images/user/btn-default-userpic.svg</file>
+    <file>images/call/btn-call.svg</file>
+    <file>images/call/btn-answer.svg</file>
+    <file>images/call/btn-ignore.svg</file>
+    <file>images/video-conf/btn-hangup.svg</file>
+    <file>images/video-conf/btn-pause.svg</file>
+    <file>images/video-conf/btn-pause-toggled.svg</file>
+    <file>images/video-conf/btn-chat.svg</file>
+    <file>images/video-conf/btn-nomic.svg</file>
+    <file>images/video-conf/btn-nomic-toggled.svg</file>
+    <file>images/video-conf/btn-novideo.svg</file>
+    <file>images/video-conf/btn-novideo-toggled.svg</file>
+    <file>images/video-conf/btn-missing.svg</file>
+    <file>images/video-conf/btn-add-contact-to-conf.svg</file>
+    <file>images/video-conf/btn-transfer.svg</file>
+    <file>images/btn-info.svg</file>
+    <file>images/ic_arrow_back_white.svg</file>
+    <file>images/video-conf/ic_high_quality_white.svg</file>
+    <file>images/ic_send_white.svg</file>
+  </qresource>
 </RCC>