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.

sdrgui/gui/basicchannelsettingsdialog.ui

@@ -157,7 +157,7 @@
      <item>
       <widget class="QCheckBox" name="reverseAPI">
        <property name="toolTip">
-        <string>Sychronize with reverse API </string>
+        <string>Synchronize with reverse API </string>
        </property>
        <property name="text">
         <string>reverse API</string>

sdrgui/gui/basicdevicesettingsdialog.ui

@@ -25,7 +25,7 @@
      <item>
       <widget class="QCheckBox" name="reverseAPI">
        <property name="toolTip">
-        <string>Sychronize with reverse API </string>
+        <string>Synchronize with reverse API </string>
        </property>
        <property name="text">
         <string>reverse API</string>

sdrgui/gui/basicfeaturesettingsdialog.ui

@@ -75,7 +75,7 @@
      <item>
       <widget class="QCheckBox" name="reverseAPI">
        <property name="toolTip">
-        <string>Sychronize with reverse API </string>
+        <string>Synchronize with reverse API </string>
        </property>
        <property name="text">
         <string>reverse API</string>

sdrgui/gui/devicestreamselectiondialog.ui

@@ -32,7 +32,7 @@
      <item>
       <widget class="QComboBox" name="deviceStream">
        <property name="toolTip">
-        <string>Devcie stream index</string>
+        <string>Device stream index</string>
        </property>
       </widget>
      </item>

sdrgui/gui/fftwisdomdialog.ui

@@ -134,7 +134,7 @@
      <item>
       <widget class="QCheckBox" name="fftwReverse">
        <property name="toolTip">
-        <string>Sychronize with reverse API </string>
+        <string>Synchronize with reverse API </string>
        </property>
        <property name="text">
         <string>reverse FFT</string>