Fix spelling

Fixed with:
find . \( -name '*.md' -o -name '*.ui' -o -name '*.html' \) -exec codespell --ignore-words-list=cach,doas,ehr,inout,lits,nd,som,verry --summary --write-changes {} \+
and manual editing.

plugins/channelrx/demodadsb/adsbdemodgui.ui

@@ -1100,7 +1100,7 @@
             <string>OAT (C)</string>
            </property>
            <property name="toolTip">
-            <string>Outside air temperature in degrees Celsuis estimated from Mach and TAS</string>
+            <string>Outside air temperature in degrees Celsius estimated from Mach and TAS</string>
            </property>
           </column>
           <column>
@@ -1132,7 +1132,7 @@
             <string>T (C)</string>
            </property>
            <property name="toolTip">
-            <string>Static air temperature in degrees Celsuis</string>
+            <string>Static air temperature in degrees Celsius</string>
            </property>
           </column>
           <column>
@@ -1148,7 +1148,7 @@
             <string>Lat (°)</string>
            </property>
            <property name="toolTip">
-            <string extracomment="Double click to centre the map on this aircraft">Latitude in degrees postive towards the North</string>
+            <string extracomment="Double click to centre the map on this aircraft">Latitude in degrees positive towards the North</string>
            </property>
           </column>
           <column>
@@ -1180,7 +1180,7 @@
             <string>TIS-B</string>
            </property>
            <property name="toolTip">
-            <string>Number of TIS-B frames received with this aircrafts ICAO</string>
+            <string>Number of TIS-B frames received with this aircraft's ICAO</string>
            </property>
           </column>
           <column>

plugins/channelrx/demoddsc/dscdemodgui.ui

@@ -865,7 +865,7 @@
         <string>RSSI</string>
        </property>
        <property name="toolTip">
-        <string>Received signal strenth indicator (Average power in dBFS)</string>
+        <string>Received signal strength indicator (Average power in dBFS)</string>
        </property>
       </column>
      </widget>

plugins/channelrx/demoddsc/readme.md

@@ -46,7 +46,7 @@ This drop down displays a list of all columns which can be used for filtering (8
 
 <h3>8: Filter Reg Exp</h3>
 
-Specifes a [regular expression](https://regexr.com/) used to filter data in the table, using data in the column specified by (7).
+Specifies a [regular expression](https://regexr.com/) used to filter data in the table, using data in the column specified by (7).
 
 <h3>9: Filter Invalid</h3>
 

plugins/channelrx/demodnfm/nfmdemodgui.ui

@@ -619,7 +619,7 @@
          <bool>true</bool>
         </property>
         <property name="toolTip">
-         <string>Display DCS code as postive/normal (+) or negative/inverted (-)</string>
+         <string>Display DCS code as positive/normal (+) or negative/inverted (-)</string>
         </property>
         <property name="text">
          <string/>

plugins/channelrx/demodpager/pagerdemodcharsetdialog.ui

@@ -17,7 +17,7 @@
    </font>
   </property>
   <property name="windowTitle">
-   <string>Set chararcter encoding</string>
+   <string>Set character encoding</string>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>

plugins/channelrx/demodradiosonde/radiosondedemodgui.ui

@@ -771,7 +771,7 @@
         <string>PCB (°C)</string>
        </property>
        <property name="toolTip">
-        <string>PCB temperature in degrees Celsuis</string>
+        <string>PCB temperature in degrees Celsius</string>
        </property>
       </column>
       <column>

plugins/channelrx/demodrtty/rttydemodgui.ui

@@ -475,7 +475,7 @@
          </item>
          <item>
           <property name="text">
-           <string>Rasied Cosine b=1 BW=0.75</string>
+           <string>Raised Cosine b=1 BW=0.75</string>
           </property>
          </item>
          <item>

plugins/channelrx/noisefigure/noisefigurecontroldialog.ui

@@ -140,7 +140,7 @@ Lines beginning with # are comments</string>
          <item>
           <widget class="QLabel" name="delayLabel">
            <property name="text">
-            <string>Delay in seconds betwen power on/off and measurement</string>
+            <string>Delay in seconds between power on/off and measurement</string>
            </property>
           </widget>
          </item>