UI/UX: refactor conversation view

This patch refactor elements placement on send panel and actions
panel of conversation view.

Change-Id: I2a934bc052333770af2d7cbde12ec471c55ca481
Reviewed-by: Andreas Traczyk <andreas.traczyk@savoirfairelinux.com>
diff --git a/src/views/IconButton.h b/src/views/IconButton.h
index 0701497..66b5350 100644
--- a/src/views/IconButton.h
+++ b/src/views/IconButton.h
@@ -69,5 +69,12 @@
 
 @property (nonatomic, strong) NSColor* imageColor;
 
+/*
+ * Image color when button is disabled
+ * default value : [[NSColor grayColor] colorWithAlphaComponent:0.3];
+ */
+
+@property (nonatomic, strong) NSColor* buttonDisableColor;
+
 
 @end