gui: Prevent status icons from being cut off

After the Qt5 switch, status icons were being cut off by 1-2px.

Also fixes some other cases where the UI is slightly off mentioned in #3800.

Fixes #3800.

src/qt/bitcoingui.cpp

@@ -151,8 +151,7 @@ BitcoinGUI::BitcoinGUI(bool fIsTestnet, QWidget *parent) :
     // Status bar notification icons
     QFrame *frameBlocks = new QFrame();
     frameBlocks->setContentsMargins(0,0,0,0);
-    frameBlocks->setMinimumWidth(56);
+    frameBlocks->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Preferred);
-    frameBlocks->setMaximumWidth(56);
     QHBoxLayout *frameBlocksLayout = new QHBoxLayout(frameBlocks);
     frameBlocksLayout->setContentsMargins(3,0,3,0);
     frameBlocksLayout->setSpacing(3);

src/qt/forms/addressbookpage.ui

@@ -122,6 +122,12 @@
      </item>
      <item>
       <widget class="QPushButton" name="closeButton">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Minimum" vsizetype="Minimum">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
        <property name="text">
         <string>C&amp;lose</string>
        </property>

src/qt/forms/sendcoinsdialog.ui

@@ -742,6 +742,12 @@
        </property>
        <item>
         <widget class="QLabel" name="label">
+         <property name="sizePolicy">
+          <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+           <horstretch>0</horstretch>
+           <verstretch>0</verstretch>
+          </sizepolicy>
+         </property>
          <property name="text">
           <string>Balance:</string>
          </property>
@@ -749,6 +755,12 @@
        </item>
        <item>
         <widget class="QLabel" name="labelBalance">
+         <property name="sizePolicy">
+          <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+           <horstretch>0</horstretch>
+           <verstretch>0</verstretch>
+          </sizepolicy>
+         </property>
          <property name="cursor">
           <cursorShape>IBeamCursor</cursorShape>
          </property>