[moserial] add tooltips to serial input line indicators

[Michael J. Chudobiak <mjc src gnome org>]

commit 931a322e136351aae3bf70f6af89a0731e6c502e
Author: Michael J. Chudobiak <mjc avtechpulse com>
Date:   Mon Jan 18 09:34:00 2021 -0500

    add tooltips to serial input line indicators

 data/ui/mainwindow.ui | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/data/ui/mainwindow.ui b/data/ui/mainwindow.ui
index 098ac0a..a010a81 100644
--- a/data/ui/mainwindow.ui
+++ b/data/ui/mainwindow.ui
@@ -342,6 +342,7 @@
                         <property name="visible">True</property>
                         <property name="sensitive">False</property>
                         <property name="can-focus">False</property>
+                        <property name="tooltip-text" translatable="yes">Shows RI input (Ring 
Indicator)</property>
                         <property name="label" translatable="yes">RI</property>
                         <property name="width-chars">4</property>
                         <property name="max-width-chars">4</property>
@@ -357,6 +358,7 @@
                         <property name="visible">True</property>
                         <property name="sensitive">False</property>
                         <property name="can-focus">False</property>
+                        <property name="tooltip-text" translatable="yes">Shows DSR input (Data Set 
Ready)</property>
                         <property name="label" translatable="yes">DSR</property>
                         <property name="width-chars">4</property>
                         <property name="max-width-chars">4</property>
@@ -372,6 +374,7 @@
                         <property name="visible">True</property>
                         <property name="sensitive">False</property>
                         <property name="can-focus">False</property>
+                        <property name="tooltip-text" translatable="yes">Shows CD input (Carrier 
Detect)</property>
                         <property name="label" translatable="yes">CD</property>
                         <property name="width-chars">4</property>
                         <property name="max-width-chars">4</property>
@@ -387,6 +390,7 @@
                         <property name="visible">True</property>
                         <property name="sensitive">False</property>
                         <property name="can-focus">False</property>
+                        <property name="tooltip-text" translatable="yes">Shows CTS input (Clear To 
Send)</property>
                         <property name="label" translatable="yes">CTS</property>
                         <property name="width-chars">4</property>
                         <property name="max-width-chars">4</property>